U05B7Invalid Data Received From Rear Radar Module A
- Generic OBD-II code · Network
- How the car detects it
- Rear radar modules are hidden in the corners of the rear bumper and feed blind spot warning, rear cross traffic alert and the exit warning that watches for cyclists when a door opens. Mercedes-Benz stores U05B755 on the 2026 CLA electric when the rear radar on the outer left sends implausible data because it is not configured; the driver assistance controller N62/5 then keeps several functions offline. Bulletin LI54.71-P-080345 (versions 1 and 2) has the N62/5 calibrated by teach-in, or alternatively by the calibration drive used after a bumper has been replaced. U05B7 thus points to a sensor that answers but is not accepted, unlike U02B6, where it no longer answers at all. Drivers notice a missing blind spot lamp on the left and assistance messages; driveability is unchanged.
- What you may notice
- Blind spot indicator on the left stays off
- Rear cross traffic and exit warnings unavailable
- Assistance unavailable message in the instrument cluster
- Likely causes
- LikelyLeft rear radar not configured in the assistance controller
- PossibleRear bumper repaired or repainted, sensor mount or cover altered
- RareMoisture or corrosion at the rear radar connector
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.