You can use the badge located in the car as a key, if required (e.g. for valet service or lending the vehicle to a friend).
Before you can use the badge, you need to activate it via the ‘My key’ tab in the app. To do this, click on ‘Transfer badge’, then place the badge on the sensor on the windscreen, and wait for the indicator light to turn green. Your badge will now act as your key.
Note that you can’t use the badge and the app’s virtual key at the same time. The key on your phone will always override the key on the badge and will deactivate it.