Mercedes-Benz AMG C43 2002–2026 — technical service bulletin

Bulletin LI42.10-P-079904 · NHTSA communication 11024405 · issued Oct 20, 2025

Technical service bulletin

communication type

Service Brakes

component

2002–2026

model years

vehicle entries

Official summary

Complaint At low speeds and light brake pressure, brakes will make a groaning or honking noise. Cause Frictional vibrations with very light brake pressure/modulations. Remedy This condition can be duplicated on most vehicles. To validate, use a like for like reference vehicle. The noise is normal behavior under the conditions listed. With very light brake pressure this noise can be induced/caused due to normal brake pad and brake rotor vibrations. Exchanging brake components will not rectify.

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.