Why is my Mercedes auxiliary battery not working?
The main cause of this problem is generally attributed to a faulty voltage converter and you can also get a computer error message reading “Stop vehicle shift to P leave engine running” when the auxiliary battery begins to malfunction.
Why does my car not start on a low charge?
However, if the battery only has a low charge, the Battery Management System (BMS) switches off the start-stop function to enable the engine to be started. A similar protective mechanism operates in the following cases: The wrong battery technology has been installed, which can only provide a small number of charging cycles.
How can I tell if my aux battery is bad?
A simple load test is to turn on your head lights with the car off. The voltage should drop only a small amount over a few minutes. When starting, voltage should only drop at most to 10.5 WHILE the starter is running.
Why is my Mercedes car not starting up?
If you are experiencing any of these error codes, the best way to check if it’s in fact the auxiliary battery is by seeing if the car starts up. If the vehicle is able to startup and operate with limited functionality, it is likely the secondary battery that is causing issues with your Mercedes-Benz.
What to do if your Mercedes auxiliary battery fails?
If this does not completely fix the problem, you may wish to take your car to a Mercedes service center or replace the whole auxiliary battery. Like the main battery, it may fail repeatedly if it has lost charge. Where is auxiliary battery located ?
What to do if your car battery won’t start?
The car may idle and run normally after you get it started, but you should not have to help it start. The day is fast approaching when it won’t start at all. It is possible your battery is simply too small for your vehicle. In either situation, you should replace it immediately.
What does it mean when a VW battery wont start?
First, you want to find out if the immobilizer is the problem. To do this, turn on the battery in your Volkswagen and see if the immobilizer warning light is flashing on your dash, most likely in your speedometer. It should look like an outline of a car with a key inside it. If it’s flashing, it means the immobilizer’s disconnected from the system.
Why does my Mercedes not start when I charge the battery?
This Mercedes-Benz is not starting because of a low battery. In this case, what you need to do is trickle charge your battery using any of these 12 volt battery trickle chargers. If you need help read this article on How to charge a Mercedes-Benz the right way. Mercedes won’t start, and it’s not the battery.