Mercedes-Benz A 220 2020–2021 — technical service bulletin
Bulletin LI35.31-P-072105 · NHTSA communication 10191281 · issued Mar 12, 2021
Technical service bulletin
communication type
Suspension
component
2020–2021
model years
11
vehicle entries
Official summary
Humming noises or vibrations from the area of the rear axle when maneuvering or moving off at traffic lights/intersections.
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.