HomeLI91.29-P-080554 · MERCEDES-BENZ, MERCEDES-MAYBACH
MERCEDES-BENZ, MERCEDES-MAYBACH

LI91.29-P-080554

Manufacturer communications

Publication date
2026-05-15
Received by NHTSA
2026-05-15
NHTSA record numbers
11032704

Manufacturer summary

Original wording in English

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.

NHTSA manufacturer communications ↗

Reported code forms

Manufacturer wording

Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.

Mercedes-BenzB228678
“The control unit calibration has been lost or was not performed

NHTSA 11032704

Mercedes-MaybachB228678
“The control unit calibration has been lost or was not performed

NHTSA 11032704

Check vehicle applicability

A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.

MakeModelModel year
Mercedes-BenzE 350 4MATIC2026
Mercedes-BenzE 350 4MATIC2025
Mercedes-BenzE 350 4MATIC2024
Mercedes-BenzE 4502024
Mercedes-BenzE 450 4MATIC2026
Mercedes-BenzE 450 4MATIC2025
Mercedes-BenzE 450 4MATIC2024
Mercedes-BenzE 450 4MATIC ALL-TERRAIN2026
Mercedes-BenzE 450 4MATIC ALL-TERRAIN2025
Mercedes-BenzE 450 4MATIC ALL-TERRAIN2024
Mercedes-BenzE 53 4MATIC+2026
Mercedes-BenzE53 E 4MATIC+2025
Mercedes-BenzE53 E 4MATIC+ ALL-TERRAIN2026
Mercedes-BenzGLC 3002026
Mercedes-BenzGLC 3002025
Mercedes-BenzGLC 3002024
Mercedes-BenzGLC 3002023
Mercedes-BenzGLC 300 4MATIC2026
Mercedes-BenzGLC 300 4MATIC2025
Mercedes-BenzGLC 300 4MATIC2024
Mercedes-BenzGLC 300 4MATIC2023
Mercedes-BenzGLC 300 4MATIC COUPE2026
Mercedes-BenzGLC 300 4MATIC COUPE2025
Mercedes-BenzGLC 300 4MATIC COUPE2024
Mercedes-BenzGLC 300 COUPE2024
Mercedes-BenzGLC 300E2025
Mercedes-BenzGLC 350 E 4MATIC2026
Mercedes-BenzGLC 350 E 4MATIC2025
Mercedes-BenzGLC43 4MATIC COUPE2026
Mercedes-BenzS 5002023

Data coverage →