Mercedes-Benz A 220 2019–2026 — technical service bulletin

Bulletin LI35.31-P-077429 · NHTSA communication 11024632 · issued Oct 29, 2025

Technical service bulletin

communication type

Power Train

component

2019–2026

model years

vehicle entries

Official summary

Complaint Instrument cluster message "4MATIC inoperative". The following fault code may be present in all-wheel drive control unit N15/17: P147354 - Erroneous adaptation of the transfer case. The calibration is missing. P14759A - The coupling of the transfer case has malfunctioned. The operating conditions for the component or the system have not been fulfilled. Cause Coupling of the rear axle differential has reached the wear limit or a coupling issue is present. Remedy Please read off the part number of the rear axle differential installed on the vehicle and check the table below to determin

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.