Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to Restore the Auxiliary Battery on a Mercedes

Model: Mercedes Mercedes Various
Part: Battery

Video tutorial

Mercedes vehicles come equipped with two batteries: the standard battery that powers the starter motor for ignition and all other electrical systems, and a second auxiliary battery primarily used for the start-stop system. The first battery is located in the engine compartment at the front, while the auxiliary battery is also in the engine compartment but under a protective cover just below the windscreen on the right side.

To access it, lift this plastic cover and disconnect the two power terminals, always disconnecting the negative first and then the positive.


Updated on 20 May 2026 by ScegliAuto


Related tutorials

How to Remove and Change the Backup Battery of a Mercedes
How to Remove and Change the Backup Battery of a Mercedes
Mercedes Mercedes Various The backup battery (or auxiliary battery) powers electrical equipment as a supplement to the main starting battery and mainly helps with the numerous…
How to put a Mercedes automatic transmission in neutral
How to put a Mercedes automatic transmission in neutral
Mercedes Mercedes Various If we need to put our Mercedes vehicle in neutral for towing, diagnostic tests, or other reasons, and want to do it safely, this is the appropriate v…
How to Reset the RunFlat Indicator on a Mercedes Vehicle
How to Reset the RunFlat Indicator on a Mercedes Vehicle
Mercedes Mercedes Various In this video, see how to restart the Run Flat indicator on most Mercedes vehicles (excluding Class A and Class B). Start the engine, and operate the…

Other guides you may be interested in

How to open the bonnet on a Volkswagen Golf?

In this tutorial, you will see how to open the bonnet on a Volkswagen Golf MK4. This is a very simple operation that follows the standard procedure. First, open the driver's door, then locate the lever in the lower left area and pull it. Next, move to the front of the vehicle, lift the bonnet slightly, and find the second lever located just above the Volkswagen logo. At this point, simply pull it towards you, fully open the bonnet, and secure it with the prop rod. To close it, gently push it down.

Watch the video!


by ScegliAuto

More videos