Mercedes-Benz AMG C43 2020–2025 — technical service bulletin

Bulletin LI18.10-P-078867 · NHTSA communication 11014684 · issued Feb 28, 2025

Technical service bulletin

communication type

Engine

component

2020–2025

model years

vehicle entries

Official summary

Complaint Red oil pressure warning in instrument cluster One of the below fault codes is stored in powertrain control unit N127: P052497 The oil pressure is too low. The system function is restricted. P052400 The oil pressure is too low Cause Various Remedy If low oil level warning present diagnose cause of this first. -Check engine oil level and correct if necessary. Refer to vehicle specific instructions AP18.00-P-1848U -Check for external engine oil leaks -Measure engine oil pressure via graphical representation in MRG actual values. In one measurement capture the pressure at idle, 1000, 20

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.