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Service bulletin LI63.20-P-076328

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10240170
Published by NHTSA2023-08-02
Manufacturer's numberLI63.20-P-076328
Manufacturer's date2023-07-13
NHTSA componentSTRUCTURE

NHTSA's 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-and-washer assembly. The two sections of sheet metal are firmly pressed together during fastening. 7. Perform a test drive and check the effectiveness. 8. Reproduce the anticorrosion protection in the working area according to manufacturer specifications. 9. Install remaining parts.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Body and frame

Vehicles listed
MERCEDES-BENZ AMG CLA352020 to 2023
MERCEDES-BENZ AMG CLA452020 to 2023
MERCEDES-BENZ CLA 2502020 to 2023

Listing a model year does not mean every vehicle of it is concerned: the document says which.