Mercedes-Benz bulletin LI77.33-P-075246
What it saysSoft top does not close: A: Soft top does not close completely B: Fault message following teach-in process Causes of repair needs for A and B: A. NHTSA’s full summary ↓
Mercedes-Benz filed this with NHTSA as a service bulletin dated Feb 23, 2024, received Oct 5, 2022, about the structure — 6 documents under this number. It names 3 model years (2022–2023). 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 communicationSoft top does not close: A: Soft top does not close completely B: Fault message following teach-in process Causes of repair needs for A and B: A. Locking hooks may require adjustment or Header Bow does not reach intermediate position B. Calibration of the Header Bow may be required Analysis to identify the remedy: If available, perform a software update of the rear passenger compartment control unit (N22/6). Then attempt operation of Soft Top. If fault continue to be present: Check the fault codes in N22/6 (Rear passenger compartment control unit) in the quick test. ⢠B196277 and/or B196377: Perform teach-in process. Select "YES" for the question regarding part exchange. If fault message appears following the process, continue with A. If no fault message appears, check the function. If the soft top does not function, continue with B. ⢠B228646 and/or B228654: Execute rear passenger compartment control unit (N22/6) control unit log and continue with step A. ⢠B180013 and/or B180071 and/or B180077: Check the wiring at the engine of the soft top lock in the top of the soft top as well as the Hall sensor above. ⢠If nothing visually can be seen: Replace electric motor A2329066500 and Hall sensor. ⢠If remedy is successful: Processing is complete; otherwise, continue with step B. If none of the specified fault codes occurs in the quick test, continue with step B.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| LI77.33-P-075246 | Service bulletin | Feb 23, 2024 | 10251109 | PDF, 48 KB |
| LI77.33-P-075246 | Service bulletin | Jul 27, 2023 | 10240162 | PDF, 48 KB |
| LI77.33-P-075246 | Service bulletin | Jul 18, 2023 | 10240167 | PDF, 47 KB |
| LI77.33-P-075246 | Service bulletin | May 4, 2023 | 10237255 | PDF, 45 KB |
| LI77.33-P-075246 | Service bulletin | Oct 31, 2022 | 10225822 | not found |
| LI77.33-P-075246 | Service bulletin | Sep 1, 2022 | 10222478 | PDF, 193 KB |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| A2329066500 | — | — |
Read by machine from the document NHTSA serves (5 pages), read Sep 30, 2026. A part number is shown only where it matches Mercedes-Benz’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the sun/moon roof assembly for the 2023 SL-Class →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2022 Mercedes-Benz AMG SL43.
A 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 2 model years this bulletin names have filed 10 complaints with NHTSA since 2015.
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 structure
Source: same model, same component group11 other manufacturer communications filed against these Mercedes-Benz models under the same component group (structure), newest first. The eight newest are listed; the rest are on the Mercedes-Benz list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| LI82.62-P-078631 | Service bulletin | Sep 14, 2026 | Complaint Clanking noise from the area of the speakers in the doors. Cause Under analysis. Remedy To narrow down the cause, first of all rem… |
| LI72.20-P-075746 | Service bulletin | Aug 24, 2026 | Complaint Tailgate opens unintentionally. Cause Accidental or unnoticed activation of the button to open the tailgate on the vehicle key. EX… |
| PSL-NCU Return Parts 7/3 | Other | Jul 3, 2026 | Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be ret… |
| LI88.50-P-080263 | Service bulletin | Jul 1, 2026 | Complaint The trunk lid does not open or close completely and must be operated manually by the customer. The following fault codes are store… |
| LI67.30-P-080343 | Service bulletin | Mar 11, 2026 | Complaint Wind noises in the area of the mirror triangle on the front doors/side window panes Cause Potential causes: • Adjustment of the si… |
| LI61.20-P-077105 | Service bulletin | Sep 3, 2025 | Complaint Cracking/clicking noise from underbody when driving slowly (around curves); see attachment. Cause Potential causes: • Assembly of… |
| LI72.10-P-074316 | Service bulletin | Oct 23, 2024 | Complaint • The flush-mounted door handle could jam when it is pulled out and may move in a jerky manner when doing so. • In the area of the… |
| LI98.00-P-078106 | Service bulletin | Sep 10, 2024 | Complaint Damage or discoloration to paint protection films on vehicle. Cause Chip protection films are a wear item that may need to be repl… |
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 LI77.33-P-075246 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 LI77.33-P-075246 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 LI77.33-P-075246 cover?
The manufacturer filed it against 3 model years: 2023 Mercedes-Benz SL-Class, 2022 Mercedes-Benz SL-Class, 2022 Mercedes-Benz AMG SL43. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.