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Service bulletin LI91.29-P-080554

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11032704
Published by NHTSA2026-05-15
Manufacturer's numberLI91.29-P-080554
Manufacturer's date2026-05-15
NHTSA componentSEATS

NHTSA's summary

Complaint One or more seat functions are restricted or inoperative. This may include: • Seat memory • Automatic seat adjustment • Easy Entry/Exit • Head restraint presetting • Collision avoidance with bench seat at rear • Actuation by other vehicle systems Seat normalization is missing, and fault code B228678 – “The control unit calibration has been lost or was not performed. Adaptation or adjustment is not correct.” is stored in the seat control unit. Additional fault codes may also be present. Cause The condition is currently under investigation. Remedy Process any additional faults first. • If a clear cause is found (for example, a failed component, wiring issue, or connector concern), repair that issue as required. If no root cause can be determined: • Do NOT perform Initial Start-up, Software Update, or Normalization of the Control Unit • Create a control unit log for the affected seat control unit. • Open a TIPS case to the Body/Chassis/Entertainment inboxand attach the control unit log for further analysis.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Seats

Trouble codes named

B2286

Vehicles listed
MERCEDES-BENZ AMG C432023 to 2024
MERCEDES-BENZ AMG C43 4MATIC2023 to 2026
MERCEDES-BENZ AMG C63 S E2024
MERCEDES-BENZ AMG C63 S E 4MATIC+2024 to 2025
MERCEDES-BENZ AMG C63 S E PERFORMANCE 4MATIC+2026
MERCEDES-BENZ AMG CLE532024
MERCEDES-BENZ AMG CLE53 4MATIC CABRIOLET2026
MERCEDES-BENZ AMG CLE53 4MATIC COUPE2026
MERCEDES-BENZ AMG CLE53 4MATIC+2024 to 2025
MERCEDES-BENZ AMG CLE53 4MATIC+ CABRIOLET2025
MERCEDES-BENZ AMG GLC432024 to 2026
MERCEDES-BENZ AMG GLC43 4MATIC2024 to 2026
MERCEDES-BENZ AMG GLC43 4MATIC COUPE2024 to 2025
MERCEDES-BENZ AMG GLC43 COUPE2026
MERCEDES-BENZ AMG GLC63 S E2025
MERCEDES-BENZ AMG GLC63 S E 4MATIC+2025 to 2026
MERCEDES-BENZ AMG GLC63 S E 4MATIC+ COUPE2025 to 2026
MERCEDES-BENZ AMG S 63 E 4MATIC+2024 to 2026
MERCEDES-BENZ C 3002022 to 2026
MERCEDES-BENZ C 300 4MATIC2022 to 2026
MERCEDES-BENZ CLE 3002024 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 300 4MATIC2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 300 4MATIC CABRIOLET2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 300 4MATIC COUPE2026 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 4502024 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 450 4MATIC2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 450 4MATIC CABRIOLET2024, 2025, 2026 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ CLE 450 4MATIC COUPE2026 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ E 3502024 to 2026
MERCEDES-BENZ E 350 4MATIC2024 to 2026
MERCEDES-BENZ E 4502024
MERCEDES-BENZ E 450 4MATIC2024 to 2026
MERCEDES-BENZ E 450 4MATIC ALL-TERRAIN2024 to 2026
MERCEDES-BENZ E 53 4MATIC+2026
MERCEDES-BENZ E53 E 4MATIC+2025
MERCEDES-BENZ E53 E 4MATIC+ ALL-TERRAIN2026
MERCEDES-BENZ GLC 3002023 to 2026
MERCEDES-BENZ GLC 300 4MATIC2023 to 2026
MERCEDES-BENZ GLC 300 4MATIC COUPE2024 to 2026
MERCEDES-BENZ GLC 300 COUPE2024
MERCEDES-BENZ GLC 300E2025
MERCEDES-BENZ GLC 350 E 4MATIC2025 to 2026
MERCEDES-BENZ GLC43 4MATIC COUPE2026
MERCEDES-BENZ S 5002021
MERCEDES-BENZ S 5002023
MERCEDES-BENZ S 500 4MATIC2022 to 2026
MERCEDES-BENZ S 5802021
MERCEDES-BENZ S 5802023
MERCEDES-BENZ S 580 4MATIC2022 to 2026
MERCEDES-BENZ S 580 E2023
MERCEDES-BENZ S 580 E 4MATIC2023 to 2026
MERCEDES-MAYBACH S 5802021
MERCEDES-MAYBACH S 580 4MATIC2022 to 2026
MERCEDES-MAYBACH S 6802023 to 2024
MERCEDES-MAYBACH S 680 4MATIC2022 to 2023
MERCEDES-MAYBACH S 680 4MATIC2025 to 2026
MERCEDES-MAYBACH SL 680 4MATIC+2026

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
LI91.10-P-0760972026-05-04. Service bulletin. Complaint Play/noise at height adjuster or in seat guide rail on front seats Cause Tolerances and variations in the manufacturing process Remedy 1. Inspect Seat Height Adjuster Barcode Label (See Pic.1) • Locate the barcode label on the cross tube of the seat height adjuster. • In isolated cases, the barcode label may be located on the front side of the cross tube. If not visible, remove the seat cushion to access the label. 2. Evaluate Production Status If Production Status is LOWER than E108 → Replace the seat frame base with the height adjuster motor. If Production Status is E108 or HIGHER → Do NOT replace parts. Please submit a TIPS case to the Body/Chassis/Entertainment inbox and attach: • Video of the noise concern • Photo of the barcode label To improve analysis quality, ensure the video meets the following criteria: • Seat installed in the vehicle • Quiet workshop environment • Steady and smooth camera movement • Good lighting on the suspected noise area • Recording with two people (one filming, while the other is creating the noise-causing movement) • Noise‑causing movement must be clearly visible • Camera position: From the rear footwell, looking forward at the front seat • Verbal explanation included in English or German
LI82.00-P-0800292026-03-11. Service bulletin. Complaint The seat may no longer be adjustable using the electric seat adjustment switch on the door module. No related error is stored in the quick test. Cause Under certain conditions, the electric seat adjustment switch may remain in sleep mode. It is then not possible to adjust the seat using this switch. This is a software error. Remedy To restore functionality, perform the following steps: 1. Remove the door trim from the affected door. 2. Unplug and reconnect the plug of the electric seat adjustment switch (No. 2 in the picture in work instruction AR91.29-P-2522WT) to perform a reset of the switch. Note: The switch does not need to be removed for this. 3. To prevent this problem from recurring, the current software version A2239029930 should be installed on the switch module “Seat Adjustment Switch Group …”. Example: S22 - Select S22 – “Seat Adjustment Switch Group, front left” (SSE-VL) → Adaptations → Control unit update → Update control unit software. If the vehicle already has SW version A2239029930, there is another cause. Please open a TIPS case to the Body/Chassis/Entertainment inbox if the issue persists with the new software installed.
LI91.10-P-0783052025-04-22. Service bulletin. Complaint The "Easy entry and exit feature" function deactivates itself after a brief period. Cause The cause is currently being investigated. Remedy A remedy is currently not available. A software update in the seat control unit does not solve the problem. The document will be updated once the reason has been analyzed and a remedy is available.
LI91.10-P-0784712024-10-25. Service bulletin. Complaint Damage to the leather strap of the seat backrest lock on the front seats (Pic.1). Cause Gap between seat backrest lock and trim ring Remedy • Ordering of new component parts (seat backrest lock and trim ring) • Clipping of trim ring to the seat backrest lock (holder) • Push the trim ring downwards • Apply the hot-melt dot from the inside - at the bottom between the trim ring and the holder of the seat backrest lock (the holder of the seat backrest lock and trim ring must be fixed together) (Pic.2)
LI91.10-P-0783052024-09-17. Service bulletin. Complaint The "Easy entry and exit feature" function deactivates itself after a brief period. Cause The cause is currently being investigated. Remedy A remedy is currently not available. A software update in the seat control unit does not solve the problem. The document will be updated once the reason has been analyzed and a remedy is available.