Mercedes-Benz AMG E 53 4MATIC+ Wagon 2020–2025 — technical service bulletin
Bulletin LI47.70-P-079912 · NHTSA communication 11025534 · issued Nov 11, 2025
Technical service bulletin
communication type
Electrical System
component
2020–2025
model years
25
vehicle entries
Official summary
Complaint Vehicle will not start after DC charging Warning in the instrument cluster related to High-voltage on board electrical system The following fault codes related to stuck contactor can be found in the High Voltage Control units : PTCU - N127 (Powertrain control unit) • P154900 - There is a warning due to overcurrent in the charging system of the high-voltage electric circuit. • P154A00 - There is a warning due to a detected crash event at standstill. • P154B00 - There is a warning due to a stuck contactor. DCB223 - N116/5 (Direct current charge connection unit) • P0E8929 - The input cu
Vehicles covered
- 2025 Mercedes-Benz AMG E 53 4MATIC+ Wagon
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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.