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Service bulletin PB421020

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 id631285
Published by NHTSA2002-05-21
Manufacturer's numberPB421020
Manufacturer's date2002-03-14
NHTSA componentSERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS

NHTSA's summary

INFORMATION ON GROANING, SQUEAKING NOISE FROM BRAKE LINES WHEN BRAKE PEDAL IS APPLIED FOR 2003 SL500. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Brakes

Vehicles listed
MERCEDES BENZ MERCEDES BENZ2003

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