Mercedes-Benz AMG GLC43 2023–2024 — technical service bulletin
Bulletin LI88.20-P-077782 · NHTSA communication 11000601 · issued May 10, 2024
Technical service bulletin
communication type
Structure
component
2023–2024
model years
3
vehicle entries
Official summary
Complaint Wind noises from the radiator shell between 30 and 60 mph Cause The noise could be caused by the position of the engine hood seal for the radiator shell in relation to the engine hood. Remedy Loosen the mounting screws at the top of the radiator shell and pull the radiator shell approx. 1–3 mm parallel to the direction of travel toward the front.
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.