What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer communications
8Original wording in English
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system – malfunction / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" "Active steering assist…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause…
MERCEDES-BENZ, MERCEDES-MAYBACH
Reported code forms U186B29
Complaint Hand detection system not operating correctly / vehicles with code 266 Fault message in instrument cluster: "Active Emergency Stop Assist not available" "Active Lane Keeping Assist not available" Cause…
Check vehicle applicability
311A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Cadillac | ELR | 2014 |
| Mercedes-Benz | A 220 | 2022 |
| Mercedes-Benz | A 220 | 2021 |
| Mercedes-Benz | A 220 | 2020 |
| Mercedes-Benz | A 220 | 2019 |
| Mercedes-Benz | AMG A35 | 2021 |
| Mercedes-Benz | AMG A35 | 2020 |
| Mercedes-Benz | AMG A35 4MATIC | 2020 |
| Mercedes-Benz | AMG C43 | 2024 |
| Mercedes-Benz | AMG C43 | 2023 |
| Mercedes-Benz | AMG C43 4MATIC | 2023 |
| Mercedes-Benz | AMG C63 S E | 2024 |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.