Mercedes-Benz U05B7E1
range radar sensor calibration drive as outlined in LI54.71-P-078377. If one or more unsuccessful programming or coding operation occurs – observe SI54.21-P-0067S. 3. Disconnect XE
Quick answer
For US-market 2024–2025 Mercedes-Benz EQS vehicles, DTC U05B7E1 may be present after a driver-assistance control-unit software update when the required short-range radar sensor calibration drive has not been completed. The cited Mercedes-Benz/NHTSA communication directs technicians to perform the calibration drive in LI54.71-P-078377.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does U05B7E1 mean?
For US-market 2024–2025 Mercedes-Benz EQS vehicles, DTC U05B7E1 may be present after a driver-assistance control-unit software update when the required short-range radar sensor calibration drive has not been completed. The cited Mercedes-Benz/NHTSA communication directs technicians to perform the calibration drive in LI54.71-P-078377.
2. Technical explanation
Verified evidence states that U05B7E1 may remain after software updating because the calibration drive was not completed. The manufacturer communication says the software update is complete only after all control units have been programmed and coded successfully. It then directs clearing U05B7E1 by performing the short-range radar sensor calibration drive specified in LI54.71-P-078377. If programming or coding is unsuccessful, the communication directs technicians to SI54.21-P-0067S.
3. What system is affected?
Driver assistance system / short-range radar sensor calibration, based on the cited control-unit update and calibration instructions.
4. How serious is this code?
Not yet established by verified evidence. The supplied record lists severity as unknown.
5. Symptoms you may notice
- U05B7E1 may be stored after a software update when the calibration drive has not been completed.
- Other vehicle symptoms are not yet established by verified evidence.
6. Possible causes
- The cited manufacturer communication identifies an incomplete short-range radar sensor calibration drive after software updating as a reason U05B7E1 may be present.
- Unsuccessful programming or coding operations are referenced in the communication; the instructed reference is SI54.21-P-0067S.
- Additional causes are not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence. The supplied record lists safe-to-drive status as unknown.
8. Can I charge the vehicle?
Not yet established by verified evidence. The supplied record lists safe-to-charge status as unknown.
9. What you can safely do
- Arrange diagnosis by an authorized Mercedes-Benz service provider or a qualified technician using the applicable Mercedes-Benz diagnostic process.
- Provide the technician with DTC U05B7E1 and note whether it appeared after driver-assistance system software programming or updating.
- Do not attempt control-unit programming, coding, or radar calibration procedures without the applicable equipment, documentation, and training.
10. Step-by-step troubleshooting
- Verify whether the driver assistance system control-unit software update was completed successfully, including successful programming and coding of all applicable control units.
- If U05B7E1 is present after the update, perform the short-range radar sensor calibration drive according to LI54.71-P-078377.
- If one or more programming or coding operations were unsuccessful, observe SI54.21-P-0067S.
11. When to contact service
Service is appropriate because the verified procedure requires Mercedes-Benz XENTRY-guided control-unit updating and a specified radar calibration drive. The supplied evidence does not establish urgency or a driving restriction.
12. What the service center may check
- Check completion status of the applicable driver assistance system control-unit software update.
- Confirm that all applicable control units were programmed and coded successfully.
- Perform the short-range radar sensor calibration drive specified in LI54.71-P-078377 to clear U05B7E1 when applicable.
- Follow SI54.21-P-0067S if programming or coding was unsuccessful.
13. Possible repair or resolution
- Complete the applicable control-unit software update, with all control units programmed and coded successfully.
- Complete the short-range radar sensor calibration drive in LI54.71-P-078377 when U05B7E1 remains after updating.
- Address unsuccessful programming or coding using SI54.21-P-0067S.
14. Affected vehicles
- Mercedes-Benz EQS · 2024–2025 · US
15. Related TSBs / service bulletins
- NHTSA Manufacturer Communication PDF 11019812: NCU - 2025050010, published June 6, 2025. The communication states that U05B7E1 may be present after a software update due to an incomplete calibration drive and directs a short-range radar sensor calibration drive under LI54.71-P-078377.
- The cited communication also references SI54.21-P-0067S for unsuccessful programming or coding operations.
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Verified source: NHTSA Manufacturer Communication PDF 11019812: NCU - 2025050010 (Mercedes-Benz), published June 6, 2025: https://static.nhtsa.gov/odi/tsbs/2025/MC-11019812-0001.pdf
19. Frequently asked questions
What does U05B7E1 mean for a 2024–2025 Mercedes-Benz EQS?
The supplied official communication states that U05B7E1 may be present after a software update because the required short-range radar sensor calibration drive has not been completed.
How is U05B7E1 cleared according to the manufacturer communication?
The communication directs performance of the short-range radar sensor calibration drive outlined in LI54.71-P-078377.
Can I drive or charge with U05B7E1?
Not yet established by verified evidence. The supplied diagnostic record lists both safe-to-drive and safe-to-charge status as unknown.
What if programming or coding was unsuccessful?
The cited manufacturer communication directs technicians to observe SI54.21-P-0067S if one or more programming or coding operations are unsuccessful.