Mercedes U11a687 !free! Page

If you drive any Mercedes built after 2014 with , you are a potential candidate for U11A687.

A: Yes, if your vehicle is within the 4-year/50,000-mile new car warranty or an extended warranty that covers electrical components. Emissions warranty does not cover battery sensors. mercedes u11a687

A dying 12V AGM battery (below 40% state of health) can cause erratic voltage spikes or dips. The IBS may go into a fault state or stop responding to wake-up signals from the ECU, triggering U11A687 as a secondary code. If you drive any Mercedes built after 2014

Even if voltage looks fine, a carbon-pile load test may reveal a dead cell. A failing battery can mimic a sensor fault. A dying 12V AGM battery (below 40% state

The Mercedes-Benz fault code specifically indicates a communication malfunction with the "Radar Sensorics" control unit . The "87" suffix at the end of the code typically signifies that a required message is missing from the communication network, meaning the vehicle's central computer cannot "hear" from the radar sensor. System Impact and Symptoms