Your Mercedes-Benz car key is crucial to conveniently accessing your vehicle, especially if it is equipped with KEYLESS-GO Comfort Package. Without the need for you to pull out your car key, sensors automatically detect it in the vicinity to enable a range of functions, including: 

• Locking and unlocking car doors
• Switching the engine on or off
• Opening and closing the boot compartment with a simple kicking motion beneath the rear bumper, for vehicles with hands-free access

Since your Mercedes car key battery is essentially under continuous use, it will eventually be drained. If you are noticing increasing difficulties with KEYLESS-GO functions, it may be time for a battery replacement. We recommend replacing your car key battery once a year to ensure its optimal functioning.