When these primary vehicle control units attempt to ping the radar sensors to fetch spatial data—such as checking the distance to the car ahead—and receive no signal, they immediately trip the U11A600 fault code. Common Symptoms Accompanying U11A600
Are you experiencing active , or did this code simply show up during a routine scan with no noticeable symptoms ? Share public link
In many cases, yes. Mercedes-Benz issued a technical bulletin (LI46.35-P-069432) stating that for certain models like the B-Class (W247) B250e (2014-2017) , this code can be shown by mistake
A detailed diagnostic report on a 2019 Mercedes-Benz E300L revealed that the U11A600 code was ultimately caused by an internal short circuit within the A108 unit. Measuring the internal resistance of the faulty A108 unit showed a value of 14.7 kΩ, which was significantly lower than the 18.6 kΩ measured on a known-good unit, confirming an internal electrical fault. Replacing the A108 unit completely resolved the issue. mercedes-benz u11a600
Need a specific wiring diagram for your chassis? Leave a comment below or consult the Mercedes WIS (Workshop Information System) for official repair procedures.
In essence, the U11A600 is a messenger. It translates the digital commands from the vehicle’s central computer (the ESP or TCU) into physical, hydraulic action. It is the point where electrons become force.
These systems depend on real-time data from radar sensors (often located behind the front bumper, grille, or rear bumper) to function correctly. A communication fault like U11A600 means one of these sensors is not sending data, leading your car to deactivate the affected safety features as a precaution. When these primary vehicle control units attempt to
: This code is frequently seen on Model 247 (B-Class / GLB) vehicles equipped with the SA code 243 (Active Lane Keeping Assist).
The Ghost in the Machine: Understanding Mercedes-Benz Fault Code U11A600
Corrosion, loose connectors, or frayed wires leading to the radar sensor can cause intermittent communication loss. 4. Low Voltage Mercedes-Benz issued a technical bulletin (LI46
Under "CAN Bus Utilization," check for error frames (invalid frames per second). Anything above 5% indicates electrical noise.
If you are technically inclined, you can perform some of these preliminary checks. However, due to the complexity of the systems involved, a full resolution will likely require professional-grade tools and expertise. Follow this logical sequence:
XENTRY Diagnostics (the proprietary Mercedes factory diagnostic tool) defines U11A600 as: “Communication with the 'radar sensor system' control unit has a malfunction.”
Typically A000 905 29 03, A000 905 31 03, or A001 153 93 28 (confirm for your specific engine).
Beyond the dashboard alerts, you may notice that the following advanced safety features are disabled or operating in a reduced capacity: