Check engine light comes on when driving/starting the vehicle
Mercedes-Benz technical service bulletin LI54.21-P-078926 for 2020-2025 Mercedes-Benz CLA250, 2021-2025 Mercedes-Benz GLA 250 and 2020-2025 Mercedes-Benz GLB 250 and others.
- Bulletin number
- LI54.21-P-078926
- Component
- Electrical system
- Summary
- Complaint Check engine light comes on when driving/starting the vehicle. No drivability concerns. Cause SW conflict of the 48V battery Remedy Update the 48V battery to SW 25/12 A0019020424
Owners of these vehicles have filed 39 complaints in the electrical category.
Vehicles covered
- Mercedes-Benz CLA250 2020-2025 202020212022202320242025
- Mercedes-Benz GLA 250 2021-2025 20212022202320242025
- Mercedes-Benz GLB 250 2020-2025 202020212022202320242025
- Mercedes-Benz AMG Cla45 2020-2023 2020202120222023
- Mercedes-Benz AMG Gla45 2021-2023 202120222023
- Mercedes-Benz AMG Glb35 2021-2025 20212022202320242025
- Mercedes-Benz AMG Cla35 2020-2024 20202021202220232024
- Mercedes-Benz AMG Gla35 2021-2025 20212022202320242025
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