Mercedes-Benz ML320 2009 — technical service bulletin
Bulletin SB-2009120003 · NHTSA communication 10033075 · issued Dec 1, 2009
Technical service bulletin
communication type
Electrical System
component
2009
model years
5
vehicle entries
Official summary
Mercedes benz: check coolant protection level of the hybrid power electronics module and high voltage battery, correct if necessary. Model and my 164 2010. *pe
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.