Rear spoiler sporadically remains in opened position or does not extend and a fault message appears in the...
Mercedes-Benz technical service bulletin LI77.25-P-073749 for 2019-2023 Mercedes-Benz AMG GT53, 2020-2024 Mercedes-Benz AMG GT43 and 2019-2024 Mercedes-Benz AMG GT63 and others.
- Bulletin number
- LI77.25-P-073749
- Component
- Structure
- Summary
- Rear spoiler sporadically remains in opened position or does not extend and a fault message appears in the instrument cluster. The rear spoiler can then no longer be retracted manually using the button. The function of the rear spoiler is re-established after an ignition reset and the fault message is no longer present in the instrument cluster. Possible causes: ⢠Coding of the AMG DRIVE UNIT for recognition of Hall sensor when retracting rear spoiler. ⢠Hardware tolerances / hardware wear If new software for the AMG DRIVE UNIT is available, carry out the software update. If the vehicle already has the most current version of the AMG DRIVE UNIT software installed, conduct SCN coding of the AMG DRIVE UNIT. Then check the currently learned actual values under the path "DRVU -> Actual values -> Rear wing sensor system" (print AV screen prior to completing initialization):
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