Mercedes-Benz Key Fob Battery Replacement & Sizes
Find the correct key fob battery size for your Mercedes-Benz. Select your model and year to see the exact replacement battery, or use our step-by-step replacement guide.
How to replace a Mercedes-Benz key fob battery
Most Mercedes-Benz key fobs use a small 3V coin-cell battery (such as CR2032 or CR2025). Open the fob along the seam, swap the battery with the same size, and snap it closed. See our full how-to guide or browse your model below to confirm the exact size.
Mercedes-Benz key fob battery sizes
These battery types are used in Mercedes-Benz key fobs. Not sure which one fits yours? Select your model and year below, or use our Battery Size Guide.
Mercedes-Benz Models
Select your Mercedes-Benz model and year to find the exact battery for your key fob.
Find Your Exact Battery
Use our vehicle selector to find the exact battery for your Mercedes-Benz key fob.
