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 Replace the Battery in a Mercedes Class B Key Remote

Model: Mercedes Classe B W245, MK 1 - Years 2005-2011
Part: Key

How to replace the battery in a Mercedes Class B key remote? Take your remote and slide the button to release the metal key; Using a screwdriver, push the button inside. Apply pressure until the battery holder separates; remove the battery holder, replace the old battery with a new one of the same size and voltage using a screwdriver. Refit the cover with the buttons by pressing on the key remote until you hear it click into place. Finally, insert the metal key back into the remote. Check the remote's proper functioning.

Updated on 6 March 2026 by ScegliAuto

Video tutorial

Related tutorials

How to Change the Key Fob Battery of a Mercedes B-Class
How to Change the Key Fob Battery of a Mercedes B-Class
Mercedes Classe B (2005-2011 / W245, MK 1) How to change the key fob battery of a Mercedes B-Class? Follow these steps. Take your ignition key fob and extract the metal key (as shown in the vi…
How to replace the battery of the Mercedes B-Class key
How to replace the battery of the Mercedes B-Class key
Mercedes Classe B (2011-2019 / W246, MK 2) In this short video, it is illustrated how to replace the battery of the key on the Mercedes Class B. The procedure is very simple and requires littl…
How to Replace the Key Fob Battery in a Mercedes B-Class
How to Replace the Key Fob Battery in a Mercedes B-Class
Mercedes Classe B (2011-2019 / W246, MK 2) How do we change the battery in the key fob of our Mercedes B-Class? Let's see in detail how to do it. Take your ignition remote and remove the metal…

Other guides you may be interested in

Fuses Location and Diagram for the Volkswagen Crafter

In this guide, we will look at the location of the fuse boxes and how to find their diagram for the Volkswagen Crafter. First, get inside the vehicle and start by removing the plastic cover found under the steering wheel, to access the internal fuse box; you will find another fuse box in the engine compartment by removing the plastic cover located next to the battery. At this point, use the owner's manual to find the fuse diagram, which will allow you to identify and replace any blown fuses with new ones!

Watch the video!


by ScegliAuto

More videos