Mercedes-Benz AMG CLA35 2020–2023 — technical service bulletin

Bulletin LI63.20-P-076328 · NHTSA communication 10240170 · issued Jul 13, 2023

Technical service bulletin

communication type

Structure

component

2020–2023

model years

vehicle entries

Official summary

Cracking and creaking noise from area of inner B-pillar when driving on rough terrain. Spot welds in the area of the inner B-pillar could cause noises due to tension or contact of the sheet metal. 1. Park vehicle in the sun/heat and allow it to warm up. 2. Then perform a test drive; the noise complaints must be reproducible. 3. Remove upper B-pillar trim. 4. Mark the position of the bore in the upper area of the B-pillar with the aid of the spacer disk. 5. Drill through the sheet metal. 6. Push the hexalobular bolt through the bore, attach the spacer disk and fasten it completely with the nut-

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.