Mercedes-Benz AMG GLE53 2019–2024 — technical service bulletin

Bulletin LI20.40-P-070996 · NHTSA communication 11005347 · issued Jul 31, 2024

Technical service bulletin

communication type

Engine

component

2019–2024

model years

vehicle entries

Official summary

Complaint Yellow coolant warning system message appears in instrument cluster. Fault code P048392 or P048397 present in N127 Powertrain Control Unit. Cause Faulty communication between fan and control unit N127-PTCU. Remedy If other fault codes related to engine fan are present, process these first. Replace engine fan with part as specified in XENTRY parts information. Group 50/015. Note: Do not install a lower wattage fan than what was originally installed in vehicle.

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.