Mercedes-Benz AMG GLC43 2023–2025 — technical service bulletin
Bulletin LI20.00-P-076708 · NHTSA communication 11018516 · issued May 15, 2025
Technical service bulletin
communication type
Engine
component
2023–2025
model years
14
vehicle entries
Official summary
Complaint 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 Cause Under analysis. Remedy Model 254 -Update software of PTCU N127 -Cleared fault codes and check vehicle operation Model 167 Disconnect 12V battery and leave for 20 minutes. Reconnect battery and clear fault codes. Perform 2 test drives, with at least 5 minutes in between with ignition off. If vehicle operates normally, it can be r
Vehicles covered
- 2024 Mercedes-Benz AMG GLC43
- 2025 Mercedes-Benz AMG GLC63 S E
- 2025 Mercedes-Benz AMG GLC63 S E 4MATIC+ Coupe
- 2024 Mercedes-Benz AMG GLE53 4MATIC+
- 2024 Mercedes-Benz AMG GLE63 S 4MATIC+
- 2023 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300
- 2025 Mercedes-Benz GLC 300
- 2024 Mercedes-Benz GLC 300 Coupe
- 2025 Mercedes-Benz GLC 350 E 4MATIC
- 2024 Mercedes-Benz GLE 350
- 2024 Mercedes-Benz GLE 450
- 2024 Mercedes-Benz GLE 450E 4MATIC
- 2024 Mercedes-Benz GLE 580 4MATIC
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.