Fitting a new battery
If you have been having trouble starting your Mercedes-Benz GL or receiving battery voltage warnings, it is possible that your car's battery is failing. Instead of waiting for it to completely die (which can happen at the most inconvenient moments), you can save money on dealership fees by replacing it yourself.
Related: What is the best battery to buy?
You will need:
- - A new battery (check your owner's manual for the correct model for your GL)
- - 10mm socket
- - 13mm socket
- - Socket wrench
- - Socket wrench extension
- - Pry bar or large, flat screwdriver
- - Craft knife or box cutter
- - Safety wear - goggles and gloves
Let's get it done
1. The battery is located under the driver's seat. Slide the seat all the way forward to access it.
2. Entering from the back door, use the pry bar or screwdriver, pry off the cover that rests under the seat.
3. If your battery hasn't been replaced before, you will need to make a small cut in the carpet in the back, right corner to allow for it to be lifted.
4. The now visible ducting is secured with a plastic rivet in the back, right corner. Use the pry bar or screwdriver to pry this loose. Remove the ducting by pulling it towards you.
5. Lift the plastic battery cover off of the battery and remove it.
6. Locate the retaining bracket on the side nearest to you. Use the 13mm socket with an extension to remove this bracket.
7. Remove the negative terminal (Black / NEG / -) with the 10mm socket.
8. Remove the positive terminal (Red / POS / -) with the 10mm socket.
9. Remove the battery by lifting up and pulling it towards you. Wear gloves as the white corrosion is acidic and will damage your skin.
10. Reverse the process when installing your new battery. Note that you will need to enter in your radio code and any preset radio stations and settings will be reset to default.
While your battery is out, you will also be able to access the auxiliary battery, located within the battery well.
Images courtesy of DIY Source
