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2020 Mercedes-Benz SLC-Class

Gas

Two Seaters
2 EPA-rated configurations
Data refreshed 2026-10-26

Safety Signal

89 / 100 from the NHTSA recall record

RecallsNHTSA campaigns 2

Complaintsnone reporting a crash, fire or injury 2

Crash ratingnot rated by NHTSA —

Fuel economybest combined, EPA 27 mpg

2020 2019 2018 2017 2016

The 2020 Mercedes-Benz SLC-Class is sold in the U.S. as a gas convertible with 2 EPA-rated configurations. The most efficient version, the SLC300, is EPA-rated at 27 mpg combined. NHTSA lists 2 recall campaigns for this model year, which gives it a Safety Signal grade of B. Owners have filed 2 complaints, most often about the electrical system.

Mercedes-Benz SLC-Class — photograph via Wikimedia Commons — Mercedes-Benz SLC-Class · Photo: Jakub "Flyz1" Maciejewski · CC BY-SA 4.0 · Wikimedia Commons

Specs & fuel economy

Source: EPA fueleconomy.gov

Configuration	Powertrain	Drive	Engine / motor	City	Hwy	Comb	Annual fuel*
SLC300	Gas	RWD	2.0L 4-cyl turbo	23	32	27	$3,050
AMG SLC43	Gas	RWD	3.0L 6-cyl turbo	20	29	23	$3,550

*EPA estimate at 15,000 miles/year at EPA reference fuel and electricity prices. fueleconomy.gov record ids: 42385, 42211.

Emissions & certification

Source: EPA emission certificates

Configuration	Smog rating	Emission standard	Where it can be sold new	SmartWay
SLC300	3 / 10	California LEV-III ULEV125 / Federal Tier 3 Bin 125	All 50 states (federal, all altitudes); California and states following California standards	—
AMG SLC43	5 / 10	California LEV-III ULEV70 / Federal Tier 3 Bin 70	All 50 states (federal, all altitudes); California and states following California standards	—

Certified for all fifty states, so it can be registered new anywhere in the U.S.

The smog rating scores tailpipe pollutants other than greenhouse gases, 1 (worst) to 10 (best), and is comparable only within a model year. The standard is the federal bin or California tier the configuration was certified to. Both come from the EPA certificate behind the window sticker.

Specifications filed with NHTSA

Source: NHTSA vPIC

Dimensions Exterior

Body style	Convertible/Cabriolet
Doors	2
GVWR class	Class 1: 6,000 lb or less (2,722 kg or less)

Engine Basics

Cylinders	4
Displacement	2 L
Engine configuration	In-Line

Engine Output

Horsepower

241 hp

Fuel Economy

Fuel	Gasoline

Seating

Seat rows	1
Seating capacity	2 seats

Transmission

Transmission	Automatic
Transmission speeds	9

Driver assistance

Standard: Adaptive cruise control, Anti-lock brakes, Backup camera, Blind-spot monitoring, Electronic stability control, Pedestrian automatic emergency braking

Filed by the manufacturer with NHTSA under the federal vehicle-identification rule and decoded from the VIN pattern — not a manufacturer press kit, so it describes the configurations we could identify rather than every trim (seen: AMG SLC43, SLC300). Figures for the trim you are looking at may differ.

Dimensions & weight

Source: Transport Canada

Length	162.6 in
Width (body, without mirrors)	71.3 in
Height	51.2 in
Wheelbase	95.7 in
Track, front	61.4 in
Track, rear	61.8 in
Curb weight	3,318–3,516 lb
Weight distribution, front/rear	50/50

Measured by Transport Canada for its Canadian Vehicle Specifications database, which covers the North American versions of each model — here 2 configurations: Slc 300 2-door Convertible, Slc 43 AMG 2-door Convertible. Where a range is shown, those versions differ. Width is the body without mirrors, which is why it can read narrower than a brochure figure. Before we used it we checked it against the US manufacturer press kits we hold (27 Sep 2026): wheelbase agreed within 1% on every vehicle we could compare, length on 98%, and the curb weight fell inside the manufacturer's range on 96%. Source dataset. Contains information licensed under the Open Government Licence – Canada. Licence.

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Recalls (2)

Source: NHTSA recall database

●moderate

Electrical System

See Recall Schedule

242,722 vehicles 91% reported repaired

Problem Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. Please refer to MBUSA's recall report for specific vehicle model details. An error in the communication module's SIM card software can cause a mobile network connection failure, disabling the emergency call (eCall) system. Risk A disabled eCall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury. Fix The communication module software will be updated through an Over-the-Air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.

Filed with NHTSAOwner letter PDF

NHTSA campaign 22V365000 reported May 20, 2022 Mercedes-Benz USA, LLC the full filing, and every vehicle covered →

●moderate

Electrical System

2021020025

1,292,258 vehicles 95% reported repaired

Problem Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2016 - 2021 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, GT-Class, C-Class, E-Class, S-Class, CLS-Class, SL-Class, B-Class, GLB-Class, GLC-Class, and G-Class vehicles. Please refer to the Part 573 report for specific vehicle model details. The software design of the communication module may fail to communicate the correct vehicle location for the emergency call system (eCall) in the event of a crash. Risk Failure of the eCall system may result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash. Fix MBUSA will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. The recall began March 12, 2021. Owners may contact MBUSA customer service at 1-877-762-8267. MBUSA's number for this recall is 2021020025.

Filed with NHTSAOwner letter PDF Remedy instructions PDF

NHTSA campaign 21V058000 reported Feb 5, 2021 Mercedes-Benz USA, LLC the full filing, and every vehicle covered →

These are vehicle campaigns — the ones the automaker filed against this model. NHTSA also records equipment recalls, filed by a parts maker against a component (a tyre, a child seat, an aftermarket part), and those are not listed here or counted above. nhtsa.gov/recalls shows both for a VIN.

Whether any of this applies to one specific SLC-Class

A campaign covers a build range, not a model year, so two identical-looking cars from 2020 can differ. Both of these check a VIN against the manufacturer’s own list, free, in about ten seconds. Mercedes-Benz publishes its own lookup because federal rule 49 CFR 573.15 requires it to, and to keep it current to within seven days.

NHTSA VIN check →Mercedes-Benz’s own VIN lookup →

Hear about a recall before the letter does

The manufacturer’s letter is the last step of a recall: it has up to 60 days after filing to mail owners, at the address on the registration. We email you the day NHTSA posts a recall on the 2020 Mercedes-Benz SLC-Class, with what to do next. Nothing else, ever — no newsletter, no marketing, one-click unsubscribe in every message.

Owner complaints

Source: NHTSA complaint database

2complaints filed

0 involved a crash · 0 a fire · 0 injuries · 0 deaths reported

8.8 per 10,000 built · Mercedes-Benz reported 2,271 SLC-Class built (its Early Warning production report to NHTSA)

Filed per year: 2022: 1 · 2026: 1

Most-cited components

Electrical System 1

Back Over Prevention 1

In owners' own words

Filed with NHTSA by the people who own these cars, one per problem area. Quoted as written, with anything identifying removed.

Back up camera failed to display. This problem has occurred randomly several times in the past

Back Over Prevention Sep 7, 2026 NHTSA owner report · ODI 11762536

Complaint counts are raw owner reports to NHTSA, not verified defects, and scale with how many were sold. Use them to spot patterns, not to rank.

Crash ratings

Source: NHTSA NCAP

NHTSA has not published 5-Star crash ratings for this model year.

Service bulletins & campaigns

Source: NHTSA manufacturer communications

Communicationsfiled with NHTSA 164

Most recentmanufacturer date 2026-09-26

Kindsas classified by NHTSA 159 service bulletins, 4 others, 1 warranty extension

Most often about: Power Train, Electrical System, Exterior Lighting, Engine, Equipment.

LI27.00-P-073124 Service bulletin
2026-09-26 · Power Train
Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic /9G‑TRONIC automatic transmission) and 725.1 (NAG3 facelift/9G‑TRONIC automatic transmission facelift) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process. Cause As part of t
LI42.10-P-078779 Service bulletin
2026-09-22 · Service Brakes
Complaint Repeat workshop visit for vehicle vibration while braking from 60MPH. NOTE: Although the symptom is similar to a tire or wheel vibration, it is usually readily noticeable that it is distinctly different if it happens at all times or only while braking. Cause Although the cause of the vibration is most likely due to excessive lateral runout on the rotor or hub/wheel bearing, the system as
LI82.62-P-078631 Service bulletin
2026-09-14 · Structure — Body
Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Note: Please refer to this document i
LI27.10-P-075869 Service bulletin
2026-09-14 · Power Train
Complaint Only vehicles with a variable transfer case are affected. This can be identified through control unit N45 or N15/7 in the quick test. When accelerating with light load, vibrations or jolting sensation may come from the drivetrain. It may be mistaken for a harsh shift. Cause Modified oil quality of the transfer case over time Remedy 1. Check initial quick test for faults in the following
LI27.00-P-073124 Service bulletin
2026-09-04 · Power Train
Complaint Customer complaints relating to automatic transmission 725.0 (NAG3 Classic / 9G‑TRONIC automatic transmission) and 725.1 (NAG3 facelift/9G‑TRONIC automatic transmission facelift) For faster, more effective and more targeted diagnosis, Intelligent Predictive Repair (IPR) has been developed and integrated into XENTRY Diagnosis. This ensures an automated diagnosis process. Cause As part of
LI42.10-P-063502 Service bulletin
2026-09-01 · Service Brakes
Complaint Noises/ squealing from the service brake in various driving situations and ambient conditions. Cause Frictional vibrations Remedy The intent of this document is to reduce noise from high performance AMG brakes. AMG brakes are designed for performance under high load and in certain scenarios, can emit noise. Some scenarios are normal and some are induced by driving style like those listed
LI46.35-P-067339 Service bulletin
2026-08-28 · Steering
Complaint During part of the steering movement, it feels heavier or more difficult to steer in the same spot every time. OR Rattling, humming, dry sliding/gravel noise from the electric steering system when steering (see attachment). Complaint does not impact the ability to safely steer or control the vehicle. Cause Ball screw drive (KGT) of electric steering damaged by: 1. External force due to:
LI82.62-P-078631 Service bulletin
2026-08-06 · Structure — Body
Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all remove the door trim. • If the noise continues to occur even with the door trim removed, then continue the diagnosis working towards the speaker and if necessary, create a TIPS case with an informative video as an attachment. Information: Please refer to this doc

A service bulletin is the manufacturer telling its dealers how to diagnose or repair a known condition. It is not a recall, not a finding that the vehicle is defective, and the work is not automatically free — though a bulletin is often what a dealer works from when you describe a symptom, so quoting the document number can save a diagnosis. The count is every communication filed; the list shows the most recent, one entry per campaign, because a single campaign is usually filed as several documents on the same day. The summaries are NHTSA's; the full documents come from the manufacturer.

Diagnostic trouble codes on file

Source: NHTSA manufacturer communications and complaints

Codes documented against this model year in the federal record. A code appearing here does not mean this vehicle will set it — it means the code is part of this nameplate-year's documented history.

Code	What it means	Most often filed under	Where it appears
C350E C350E on Mercedes-Benz →	Manufacturer-defined — the meaning is set by the automaker, not the standard.	Engine	3 bulletins

Generic codes (the second character is 0 or 2) mean the same thing on every vehicle sold in the United States. Manufacturer-specific codes (1 or 3) mean whatever the automaker assigned, and no honest source can define them for you — which is why the ones here carry the evidence instead of a definition. A code is a link when enough separate federal documents name it across the catalogue to be worth a page of its own; the rest are listed here, where the vehicle is the context that makes them mean something.

SLC-Class by model year

all years, side by side →

Year Safety Recalls Complaints

2020 this page B 2 2 27 mpg 2019 B 2 1 27 mpg 2018 A 1 1 27 mpg 2017 B 2 4 27 mpg 2016 A 1 0 27 mpg

Common questions about the 2020 SLC-Class

Source: EPA, NHTSA and manufacturer press kits

Does the 2020 Mercedes-Benz SLC-Class have any recalls?

NHTSA has posted 2 recall campaigns for the 2020 Mercedes-Benz SLC-Class. The most serious on file is 22V365000, covering Electrical System. Check your own VIN at nhtsa.gov/recalls; a recall applies to specific build ranges, not every car.

How safe is the 2020 Mercedes-Benz SLC-Class?

NHTSA has not published a crash-test rating for the 2020 Mercedes-Benz SLC-Class yet. On the recall record WhichTrim grades it B (89/100), which measures open and severe recalls rather than crash protection.

What is the fuel economy of the 2020 Mercedes-Benz SLC-Class?

Across the 2 EPA-rated configurations of the 2020 Mercedes-Benz SLC-Class, the best EPA combined figure is 27 mpg. Figures are the EPA's own, per configuration, and every one is listed above.

What are the dimensions of the 2020 Mercedes-Benz SLC-Class?

Transport Canada measured it at 162.6 in long, 71.3 in wide (body, without mirrors), 51.2 in tall, on a 95.7 in wheelbase. Curb weight: 3,318–3,516 lb depending on configuration. Those are its measurements of the North American versions; every figure is in the table above.

What do owners complain about on the 2020 Mercedes-Benz SLC-Class?

Owners have filed 2 complaints with NHTSA about the 2020 Mercedes-Benz SLC-Class, most often about electrical system, back over prevention. Complaints are unverified owner reports, so treat the pattern as a signal and the individual report as an anecdote.

How clean is the 2020 Mercedes-Benz SLC-Class?

The EPA smog rating for the 2020 Mercedes-Benz SLC-Class runs 3 to 5 out of 10 across its configurations. That score covers tailpipe pollutants other than greenhouse gases, and it only compares vehicles within the same model year. It is certified for all fifty states, so it can be registered new anywhere in the U.S. Its configurations were certified to different standards — California LEV-III ULEV125, California LEV-III ULEV70, Federal Tier 3 Bin 125, Federal Tier 3 Bin 70 — which the table above lists per configuration.

Are there service bulletins for the 2020 Mercedes-Benz SLC-Class?

The manufacturer has filed 164 service bulletins and related communications with NHTSA for the 2020 Mercedes-Benz SLC-Class, most often covering power train, electrical system, exterior lighting. The most recent is dated 2026-09-26. A bulletin is not a recall: it is the repair procedure a manufacturer sends its dealers for a condition it knows about, and the work is not automatically paid for. It is still worth knowing — if the symptom matches, quoting the bulletin number at the service desk can save a diagnosis. The document numbers and summaries are listed above.

What we hold, and what an empty row means

Paid vehicle-history reports will not tell you the difference between “nothing happened to this car” and “we never received that record” — both of the big two say as much in their own help pages. Most of what is on this page comes from complete federal registers, so we can tell you which is which, row by row.

Data	Held	Source	What it covers — or what empty means
Fuel economy & configurations	2 configurations	EPA certification records	Every configuration the EPA certified for sale, with its own test figures.
Emission certificates	2 configurations	EPA emission certificates	Smog rating, standard and the sales area that decides where the car can be sold new.
Recalls	2	NHTSA recall campaigns	A complete federal register: every campaign covering this model year, with severity and advisory flags.
Owner complaints	2	NHTSA complaint database	Also complete, but unverified: these are reports owners filed, not findings. Counts scale with how many were sold.
Crash ratings	none	NHTSA NCAP	NHTSA has not tested this model year. Cars are selected for testing, so untested is not unsafe.
Service bulletins	164	NHTSA manufacturer communications	Everything the manufacturer told its dealers about a defect or malfunction, short of a recall.
Investigations	none	NHTSA Office of Defects Investigation	No defect investigation has been opened.
Driver-assist crash reports	none	NHTSA Standing General Order 2021-01	No report has been filed. Only entities named in the order report, and only crashes they hear of — so this is also what an unequipped car, or a manufacturer without telematics, looks like.
Specifications filed with NHTSA	12 fields	NHTSA vPIC, decoded from VIN patterns	What the manufacturer filed under the federal VIN rule — a configuration, not the full trim ladder.
Measured dimensions	7 fields	Transport Canada, Canadian Vehicle Specifications	Length, width, height, wheelbase, track and curb weight, measured on the North American versions.
Trims, pricing & equipment	none	Manufacturer press kit	We have not transcribed a press kit for this model year yet. This is our gap, not the manufacturer's — the one row here where an empty cell means we are behind.

Rebuilt nightly; this page was generated 2026-10-26. Every figure above is traceable to the source named beside it, and the JSON for this page carries the same values with their identifiers.

Sources & method

Safety Signal starts every model-year at 100 and subtracts points per open NHTSA recall campaign by severity: critical 15 (fire risk, park-outside or do-not-drive advisories), high 8 (brakes, steering, airbags, loss of drive power, structure, battery), moderate 6, minor 3 (software, labels, lighting fixed by an update). The most serious recall counts in full and each further one counts 85% of the one before, because a vehicle sold in millions is recalled more often than a rare one without being more dangerous — and because a flat subtraction bottomed the scale out, scoring a vehicle with 22 recalls within a point of one with six. A ≥ 90, B ≥ 80, C ≥ 70, D ≥ 60, otherwise F. Read it as what it counts: recall campaigns on the federal record, weighted by severity. The damping reduces the sales bias by roughly 40% but does not remove it: like our complaint counts, this is not normalized by how many were sold, so a best-seller still scores somewhat worse than an obscure model with the same real risk. NHTSA crash ratings, do-not-drive and park-outside advisories, and the crash, fire, injury and death counts in owner complaints are reported separately on every page and never blended into the letter — a vehicle can hold five stars and a poor letter at once, and where that happens we say so rather than leave you to notice. Because the scale subtracts from a clean sheet, a model year too new to have been recalled, complained about or bulletined scores full marks on an empty record; we label those grades provisional rather than present them as earned.

EPA figures come from fueleconomy.gov vehicle records. Recalls, complaints, investigations and crash ratings come from NHTSA's public flat files, refreshed nightly.

JSON for this page · API

2020 Mercedes-Benz SLC-Class

Specs & fuel economy

Emissions & certification

Specifications filed with NHTSA

Dimensions Exterior

Engine Basics

Engine Output

Fuel Economy

Seating

Transmission

Driver assistance

Dimensions & weight

Factory warranty running out?

Recalls (2)

Electrical System

Electrical System

Whether any of this applies to one specific SLC-Class

Hear about a recall before the letter does

Parts & accessories for the 2020 Mercedes-Benz SLC-Class

Owner complaints

Most-cited components

In owners' own words

Crash ratings

Service bulletins & campaigns

Diagnostic trouble codes on file

SLC-Class by model year

Common questions about the 2020 SLC-Class

Does the 2020 Mercedes-Benz SLC-Class have any recalls?

How safe is the 2020 Mercedes-Benz SLC-Class?

What is the fuel economy of the 2020 Mercedes-Benz SLC-Class?

What are the dimensions of the 2020 Mercedes-Benz SLC-Class?

What do owners complain about on the 2020 Mercedes-Benz SLC-Class?

How clean is the 2020 Mercedes-Benz SLC-Class?

Are there service bulletins for the 2020 Mercedes-Benz SLC-Class?

What we hold, and what an empty row means

Where to go next

Sources & method