Mercedes-Benz C 300 2022 — technical service bulletin
Bulletin LI01.60-P-077807 · NHTSA communication 11000621 · issued May 30, 2024
Technical service bulletin
communication type
Engine
component
2022
model years
1
vehicle entries
Official summary
Engine oil seeping from right rear of engine at upper area of timing case cover. Porosity in casting of timing case cover. Remedy Clean area around exhaust bracket and apply leak detection spray. Proceed with below steps if leakage is confirmed from orange bolt shown in attachment. -Remove orange bolt shown in attachment and thoroughly clean bore with brake cleaner. -Ensure bore is completely dry. -Use new bolt N000000007063 and coat threads with Loctite 222. -Install bolt and torque to 20 Nm. -Allow at least 12 hours before starting engine. Then recheck for leakage.
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.