U05B5Invalid Data Received From Front Radar Module A
- Generic OBD-II code · Network
- How the car detects it
- Front radar modules measure distance and closing speed of objects ahead for adaptive cruise, emergency braking and lane change support. Mercedes-Benz documents this code on the 2026 CLA electric (series 174): the driver assistance controller N62/5 stores U05B555 when the front radar on the outer left delivers implausible data because it has not been configured. Bulletin LI54.71-P-080345 (versions of April and May 2026) ties it to a lasting warning that the assistance systems are unavailable, mainly on cars built before 5 September 2025, and calls for an N62/5 teach-in calibration or a calibration drive followed by at least seven minutes parked and locked. Other brands use letters differently, so A is not always a corner sensor. U02B4 means module A is silent; U05B6 is the right twin.
- What you may notice
- Driver assistance unavailable message that does not clear
- Adaptive cruise and emergency braking switched off
- Lane change or blind spot functions on the front left limited
- Likely causes
- LikelyRadar sensor not configured or calibrated in the assistance controller (Mercedes N62/5)
- PossibleOutdated software in the driver assistance controller
- PossibleRadar knocked out of alignment after bumper damage or repair
- RareRadar connector behind the bumper loose or wet
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.