Mercedes-Benz E350 2013 — technical service bulletin
Bulletin SC-2013010001 · NHTSA communication 10051992 · issued Feb 1, 2013
Technical service bulletin
communication type
Engine and Engine Cooling
component
2013
model years
3
vehicle entries
Official summary
Mercedes: due to left and right secondary chain tensioners, of the check valve, being installed and pressed deeply into cylinder heads, the oil supply can not be ensured for cylinder head, and check valve, of left and right secondary chain tensioners, must be removed. Models 2013 207(e350, 550), 212 (e350, 550, 63), 218 (cls550, 63), 221(s550, 600, 65, 63, 400, 450, 350), 231 (sl). *pe
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.