Mercedes-Benz AMG GLC43 2022–2023 — technical service bulletin
Bulletin LI20.00-P-076708 · NHTSA communication 10240165 · issued Jul 24, 2023
Technical service bulletin
communication type
Electrical System
component
2022–2023
model years
7
vehicle entries
Official summary
Check engine lamp activated, coolant warning message, and engine fan running at full speed. Below fault codes stored in N127 PTCU related to LIN network components. U063200, U063287, U02A900, U02A987, U0698E4, U0698E5, U02C800, U02C887, U063B00, U063B87 Under analysis. Create a TIPS case with findings of below checks. Include: â ¢ Initial quick test showing fault codes. â ¢ Details from owner on events leading up to symptoms Inspect wiring and connections (pins/sockets) for damage or corrosion at below components. -N127 -X25/7x1 -M4/7 Engine cooling fan -Y73/1 coolant directional control valve
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.