Mercedes-Benz 209 2003 — technical service bulletin
Bulletin 070021F · NHTSA communication 10002965 · issued Jul 11, 2003
Technical service bulletin
communication type
Engine and Engine Cooling
component
2003
model years
4
vehicle entries
Official summary
Engine ticking (piston slap like sound) noise when accelerating between 1200 and 3000 rpm. *tt
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.