Mercedes Auxiliary Battery Malfunction - Solved

In this video I am showing the way I am dealing with Auxiliary Battery Malfunction problem. This is unfortunately quite common issue across entire Mercedes model range. Dealership offers option to take back the old unit and take some ££ off the new one. When this issue starts, I highly recommend to take care of it as soon as possible. You can still use your vehicle without an issue, however if your main battery will fail for whatever reason, you will be stuck. The main function of this Aux Battery/Capacitor is to hold enough charge to serve critical electrical components of the vehicle such as gear selector.