How Do I Fix My Mercedes Auxiliary Battery Malfunction?

When your Mercedes auxiliary battery goes out, you might be left stranded on the side of the road. In this article, we’ll show you how to fix a Mercedes auxiliary battery malfunction.

Quick Fix

If your Mercedes-Benz auxiliary battery is not charging or not holding a charge, there is a quick fix. You can try one of the following:

– Move your car to a shady spot or indoors. This will help to increase the battery’s internal resistance and force more juice into the battery.

– Turn off all electronics in your car (radio, air conditioning, etc.). This will help to conserve power and help the battery charge quicker.

– Try charging your auxiliary battery overnight using a standard outlet. If you have an automatic charger, make sure that it is set to “auxiliary” and not “main.”

What is a Mercedes auxiliary battery?

A Mercedes auxiliary battery is a small, rechargeable battery that is used to power certain components of a Mercedes-Benz automobile. The battery can malfunction and need to be replaced. When should I replace my Mercedes auxiliary battery?

Mercedes-Benz recommends that you replace your Mercedes auxiliary battery at least every eight years, but usually at least every four years. If your Mercedes auxiliary battery is not performing as it should, there are some things you can do to troubleshoot the problem and fix it.

How do I fix a Mercedes auxiliary battery malfunction?

Mercedes-Benz auxiliary batteries are a great feature, but they can also malfunction. If your auxiliary battery is not working, there are a few ways to fix the issue. You can try resetting the battery, replacing the battery, or getting help from a Mercedes-Benz dealer.

6 ways to fix Mercedes auxiliary battery malfunction

1. Check to make sure the battery is properly connected to the car. Make sure all the cables are plugged in and that the battery is firmly attached to the car.

2. If you’re using a generic battery, make sure it’s compatible with your car. Some cars require certain brands or types of batteries, so it’s important to check before you buy.

3. Clear any debris from around the battery terminals. This can help reduce the chances of your car’s electrical system malfunctioning when trying to use the auxiliary battery.

4. Try replacing the auxiliary battery if it isn’t working properly. If the problem is with the wiring, you may be able to replace the auxiliary battery without having to replace the entire electrical system.

5. If none of these methods work, it may be time for a new auxiliary battery.

6. Consider temporarily turning off the car’s electrical system if you’re having trouble using the auxiliary battery. This can help reduce the chances of a total system malfunction.

Video Guide on Mercedes Auxiliary Battery Malfunction


If your Mercedes auxiliary battery is not working properly, there are a few things you can do to try and get it back up and running. First, check to see if the battery is drained. If it seems like the battery is low on power but the car still won’t start, try turning off all of the car’s electrical systems one at a time and seeing if that fixes the issue. In some cases, an auxiliary battery may need to be replaced altogether. If you have any other questions about how to fix your Mercedes auxiliary battery malfunction, please don’t hesitate to reach out to our team here at AAMCO Mercedes-Benz.

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