Mercedes-Benz S550 2007 — technical service bulletin
Bulletin 2006120006 · NHTSA communication 10022322 · issued Dec 1, 2006
Technical service bulletin
communication type
Engine and Engine Cooling
component
2007
model years
3
vehicle entries
Official summary
Replace abc high-pressure line; inspect coolant hose and replace if necessary. *kb
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.