Keys
The standard key and Care Key are equipped with buttons. Additional keys to the number included as standard can be ordered. For cars equipped with keyless locking and unlocking*, a slightly smaller, lighter and button-less key (Key Tag) can be purchased as an accessory.
To start the car, a key needs to be within the front part of the passenger compartment.
For cars equipped with keyless locking and unlocking (Passive Entry)* the key can be anywhere in the car to start the car.
The keys can be linked to different driver profiles to save personal preferences in the car. Care Key is linked to a specific driver profile that is more restricted.
Warning
The key contains a button cell battery. Keep new and used batteries out of the reach of children. If someone swallows a battery it may cause serious injury.
If damage is discovered, e.g. if the battery cover cannot be closed properly, then the product should not be used. Keep defective products out of the reach of children.
Key buttons
Locking - Pressing the button locks the doors, tailgate and fuel filler flap and also arms the alarm*. - A longer press closes all windows as well as the panoramic roof*.
- A longer press closes all windows as well as the sunroof*.
Unlocking - Pressing the button unlocks the doors, tailgate and fuel filler flap and also deactivates the alarm.- A longer press opens all windows simultaneously. For example, it can be used to quickly air a hot car.
Tailgate - Unlocks the tailgate only and disarms its alarm. On cars with power operated tailgate*, the tailgate is opened automatically when the button is held depressed. The tailgate is also closed with a long press – acoustic warning signals sound. 
Panic function - Used to attract attention in an emergency. Press and hold the button for at least 3 seconds or press it twice within 3 seconds to activate the direction indicators and the horn. The function can be turned off with the same button once it has been active for at least 5 seconds. Otherwise the function switches off automatically after 3 minutes.
Warning
If anyone is left in the car, make sure the power windows and panoramic roof* are de-energised by always taking the key with you when you leave the car.
Note
Button-less key (Key Tag)*
A Key Tag can be ordered as an accessory for cars equipped with the keyless locking and unlocking function. Starting and keyless locking and unlocking work in the same way as with the standard key. The key is waterproof to a depth of approx. 10 metres (30 feet) for up to 60 minutes. It does not have extending key blade, and the battery cannot be replaced.
Care Key restricted key
A Care Key makes it possible to set a limit for the speed of the car when that particular key is used. The limitation is intended to encourage the car to be driven in a safe manner, e.g. when being loaned out.
If the active key is removed from the car
If the key is removed from the car when the engine is running, the warning message, Car key not found Removed from car, is shown in the driver display and an acoustic reminder sounds when the last door is closed.
The message disappears when the key is returned to the car, followed by a press of the right-hand keypad's O button, or when all doors have been closed.
Interference
Key functions for keyless starting and keyless locking and unlocking* can be disrupted by electromagnetic fields and screening.
Note
If there is still interference - use the key's detachable key blade to unlock. Then place the key in the back-up reader in the cup holder to disarm the alarm and allow the car to be started.