Mercedes-Benz Driver Assistance System Func- tions Limited Please Drive with Caution See Operator
Driver Assistance System Func- tions Limited Please Drive with Caution See Operator
Common search variants: Driver Assistance System Functions Limited Please Drive with Caution See Operator · Search ignores case and common separators.
Quick answer
For applicable 2026–2027 U.S. Mercedes-Benz CLA-Class vehicles, this alert is documented in an official Mercedes-Benz communication as appearing consistently at every key cycle after an update to MB.OS 1.3.7. The communication instructs verification of the exact alert and MB.OS version. Cause is listed as under determination.
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 Driver Assistance System Func- tions Limited Please Drive with Caution See Operator mean?
For applicable 2026–2027 U.S. Mercedes-Benz CLA-Class vehicles, this alert is documented in an official Mercedes-Benz communication as appearing consistently at every key cycle after an update to MB.OS 1.3.7. The communication instructs verification of the exact alert and MB.OS version. Cause is listed as under determination.
2. Technical explanation
Mercedes-Benz communication LI54.71-P-080653 addresses the exact instrument-cluster message: “Driver Assistance System Functions Limited Please Drive with Caution See Operator's Manual.” It distinguishes this wording from other white ADAS cluster-message variants. In the documented condition, the message appears at every key cycle after MB.OS is updated to version 1.3.7. The communication identifies the driver assistance control unit N62/5 Processor and documents an active and stored DTC U142791: “Implausible data were received from the control unit 'Head unit'. The parameter is outside the permissible range.” The cause is stated as under determination.
3. What system is affected?
Driver assistance system; the official communication references driver assistance control unit N62/5 Processor and communication with the head unit.
4. How serious is this code?
Not yet established by verified evidence.
5. Symptoms you may notice
- The instrument cluster consistently displays “Driver Assistance System Functions Limited Please Drive with Caution See Operator's Manual” at every key cycle in the documented condition.
- The exact message must be verified because other white ADAS cluster-message variants exist.
- An active and stored DTC U142791 is documented in the driver assistance control unit N62/5 Processor.
6. Possible causes
- After updating MB.OS to version 1.3.7, the exact message is documented as occurring consistently at every key cycle.
- The official communication lists the cause as under determination.
- DTC U142791 indicates implausible data received from the head unit, with a parameter outside the permissible range.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Read and follow the vehicle operator's manual, as directed by the displayed message.
- Verify that the displayed wording exactly matches the documented alert; the communication states that other white ADAS message variants exist.
- Arrange evaluation by an authorized Mercedes-Benz service provider if the exact message is present consistently.
10. Step-by-step troubleshooting
- A Mercedes-Benz technician can verify the MB.OS version using A26/17 in Xentry under Version or VeDoc > Vehicle Information for Control Units, as identified in the official communication.
- A Mercedes-Benz technician can check the driver assistance control unit N62/5 Processor for active and stored DTC U142791.
- Do not assume that this bulletin applies to a different driver-assistance message variant.
11. When to contact service
Contact an authorized Mercedes-Benz service provider for diagnosis of the exact recurring message, especially if it began after an MB.OS 1.3.7 update.
12. What the service center may check
- Confirm the exact instrument-cluster message.
- Confirm the installed MB.OS version using the methods cited in LI54.71-P-080653.
- Inspect the driver assistance control unit N62/5 Processor for active and stored U142791.
- Assess the documented head-unit data plausibility fault in accordance with Mercedes-Benz diagnostic procedures.
13. Possible repair or resolution
- Not yet established by verified evidence. The official communication supplied lists the cause as under determination and does not provide a verified repair resolution.
14. Affected vehicles
- Mercedes-Benz CLA-Class · 2026 · US
- Mercedes-Benz CLA-Class · 2026–2027 · US
15. Related TSBs / service bulletins
- Mercedes-Benz LI54.71-P-080653, reported through NHTSA manufacturer communications 11032968, 11033176, 11033757, and 11033805. It addresses the exact alert after MB.OS 1.3.7 and documents U142791 in N62/5 Processor.
16. Recall information
- Not yet established by verified evidence.
17. Official manufacturer information
Official source: NHTSA manufacturer communications for Mercedes-Benz LI54.71-P-080653, including NHTSA ID 11032968 and subsequent listed communications. https://static.nhtsa.gov/odi/ffdd/tsbs/TSBS_RECEIVED_2025-2026.zip#nhtsa_id=11032968
- NHTSA: NHTSA Manufacturer Communication 11032968: LI54.71-P-080653 · official_tsb
- NHTSA: NHTSA Manufacturer Communication 11033176: LI54.71-P-080653 · official_tsb
- NHTSA: NHTSA Manufacturer Communication 11033757: LI54.71-P-080653 · official_tsb
- NHTSA: NHTSA Manufacturer Communication 11033805: LI54.71-P-080653 · official_tsb
19. Frequently asked questions
Which vehicles are supported by the supplied applicability data?
The supplied data identifies U.S. Mercedes-Benz CLA-Class vehicles for model years 2026–2027.
Does this bulletin apply to every driver-assistance warning?
No. The official communication says to verify the exact message because other white ADAS cluster-message variants exist.
What fault code is documented with this condition?
The communication documents active and stored U142791 in the N62/5 Processor: implausible data received from the head unit, with a parameter outside the permissible range.
Is there a verified repair?
Not yet established by verified evidence. The supplied official communication states that the cause is under determination.