Mercedes-Benz bulletin LI54.71-P-078377
What it saysComplaint Vehicles with option code 200, DRIVE PILOT. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Sep 18, 2024, received Sep 24, 2024, about the electrical system. It names 7 model years (2021–2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationComplaint Vehicles with option code 200, DRIVE PILOT. "DRIVE PILOT cannot be activated system currently unavailable" on instrument cluster after pressing one of the DRIVE PILOT steering wheel activation button. Cause The instrument cluster message can be presented for multiple reasons. See "Remedy" section below. Remedy 1.Check for DTC's related to the system. • If yes, process DTC. • If no, proceed to 2. 2.If vehicle is low mileage or during a PDI, verify calibration of the short range radar sensors. • Print control unit log of any Short Range Radar B29/11-14 (NBR-XX). • Proceed to the bottom of the log, "Result of Calibration". • Check "Alignment_quality XX" for each radar and confirm they are "Mature alignment". • If all "Mature alignment" - Continue to step 3. • If not all "Mature alignment" - Continue to "Calibration Process". Calibration Process • Bring Xentry. • Find a shopping center nearby that has a grid road, parking lots with reflective signs while safely being able to drive slow and make 90 degree turns are recommended. • Park vehicle and key cycle twice. • Drive at low speeds in the area for approximately 15 minutes. Complete 90 degree turns and pass reflective signs and parked vehicles when possible. • Connect Xentry and print control unit log of any Short Range Radar B29/11-14 (NBR-XX). • Verify if the radars are "Mature alignment". • If yes, vehicle should be ready for DRIVE PILOT use. • If no, begin process again with the park and key cycle. If after a second attempt the radars are not calibrated to "Mature". Try a different plaza. If radars still do not calibrate to "Mature", open a TIPS case. 3.Verify all system activation conditions are met as prescribed by the Owner's Manual and Drive Pilot Supplement. 4.If after verifying all short range radars have been calibrated and the system activation conditions are met yet the cluster message still appears, open a TIPS case.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI54.71-P-078377 | Service bulletin | Sep 18, 2024 | 11007960 | PDF, 10 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 7 model years this bulletin names have filed 224 complaints with NHTSA since 2015. 60 of them name Electrical System — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
The contact owns a 2023 Mercedes-Benz EQS 580 4MATIC. The contact stated that while attempting to open the front driver’s side door, the door sensors failed to detect a hand and retracted independently and closed on the right index finger. Medical attention was not sought. The failure mileage was approximately 63,350
2023 Mercedes-Benz EQS · Electrical System · filed with NHTSA Sep 25, 2026 · ODI 11766894
Was driving the car at 3:00 P.M. and all of a sudden thr dash display when total black out nothing on the display screen. Speed,fuel,turnning singles nothing total black out. Took it to the dealership to fix as this can and would be a life threathing at loss of life could and can happen in a traffic sistiution
2022 Mercedes-Benz S-Class · Electrical System · filed with NHTSA Jan 6, 2026 · ODI 11709116
My 2022 Mercedes-Benz EQS 450+ repeatedly showed "Active Brake Assist Functions Limited," "Active Emergency Stop Assist Inoperative," and Blind Spot Assist warnings, photographed by September 23, 2026. On September 24, I reported these issues and showed photos to an authorized dealer.
2022 Mercedes-Benz EQS · Electrical System · filed with NHTSA Oct 22, 2026 · ODI 11773071
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the electrical system
Source: same model, same component group149 other manufacturer communications filed against these Mercedes-Benz models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI47.70-P-079912 | Service bulletin | Sep 29, 2026 | Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High‑voltage on board electrical system The… |
| LI54.30-P-080963 | Service bulletin | Sep 17, 2026 | Complaint Issue after OTA Update IC Odometer Reading blank("_ _ _ _") IC Maintanence data unavailable Cause OTA Update E61.0 Remedy In the I… |
| LI82.60-P-080383 | Service bulletin | Sep 15, 2026 | Complaint Radio station cover art does not refresh when switching stations. The UI continues to show the old station’s artwork instead of up… |
| LI54.71-P-079104 | Service bulletin | Sep 11, 2026 | Complaint Traffic sign symbol for "Traffic Sign Assist" is blinking in instrument cluster without obvious cause usually with one of the foll… |
| NCU - 2026080001 | Service campaign | Aug 15, 2026 | Issue Mercedes-Benz AG, the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year 2027 S-Class (223 platform) ve… |
| LI82.85-P-079088 | Service bulletin | Aug 14, 2026 | Complaint The following most common complaints may be observed: • Brief connectivity interruptions when using Apple CarPlay over Wi-Fi • Aud… |
| LI54.65-P-080132 | Service bulletin | Aug 12, 2026 | Complaint 1. General Diagnostic Tips 2. One or More PARK Sensor Activations 3. Red Ring Around Vehicle 4. "Active Parking and Parking Assist… |
| LI54.10-P-080880 | Service bulletin | Aug 12, 2026 | Complaint Customer Complaint: - AC charging is not possible. - The departure time, charging pause, location-based charging or target SOC lim… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Mercedes-Benz, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Mercedes-Benz LI54.71-P-078377 a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the LI54.71-P-078377 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every Mercedes-Benz warranty extension on file lists the ones Mercedes-Benz has filed.
Which vehicles does LI54.71-P-078377 cover?
The manufacturer filed it against 7 model years: 2024 Mercedes-Benz EQS, 2023 Mercedes-Benz EQS, 2022 Mercedes-Benz EQS, 2024 Mercedes-Benz S-Class, 2023 Mercedes-Benz S-Class, 2022 Mercedes-Benz S-Class and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.