Ignition Key

"Ignition Key"(Remote Controls)

The "keys" are the component that represents the access and driving authorization for the vehicle.

All keys (with the exception of the key integrated in the remote control) contain the transponder for EWS.

The delivery specification of the vehicle are:

- 2 coded remote controls with integrated mechanical key.
- A reserve key (also individually coded) with an adapter for the ZAS (ignition lock).


NOTE: Since no ignition switch in the ordinary sense is installed, the term vehicle keys is also no longer used, but instead "remote controls"




Remote Controls

The power supply for the remote controls is provided by a non-replaceable re-chargeable battery.

- Charging: The battery is charged when the remote control is engaged in the ignition switch. Charging takes place via a 125-kHz interface in the ignition switch.
- Monitoring: The re-chargeable battery voltage is monitored by the remote control. At low voltage a Check Control message is output to the instrument cluster.

Each remote control is individually coded. As a result, different memory functions can be saved for each key: for example, seat adjustment, outside mirror adjustment, steering column adjustment etc..

The operating radio frequency of the remote controls in the US. is now 868.4Mhz.

No initialization procedure is required for the Remote Controls, once the CAS has recognized the key as valid it is automatically initialized.

Mechanical Key Integrated into the Remote Control

A key is pushed into the housing of the remote control. The key is purely mechanical and contains no transponder function for the EWS.

The key is used to emergency unlock the drivers door and trunk and also to lock and unlock the center storage box (hotel switch inside) and transmission emergency park release cable. To release the key, push the small button at the end of the remote control and slide the key out.

Reserve Key with Adapter

The delivery specification also includes a reserve key with an adapter for the ZAS. The reserve key is considerably smaller than the remote controls, enabling it to be easily carried in a wallet.

The reserve key consists of an integrated transponder and a mechanically cut plastic key. An adapter is required to push the narrow, flat reserve key into the slot and to engage it. The adapter should be stored in the vehicles tool kit.

A reserve key with the adapter has full access and driving authorization for the vehicle.

Key Management

The CAS control unit can manage a maximum of 10 valid vehicle keys. 3 keys are initialized during vehicle assembly, 2 remote controls and one reserve key.

The customer can order 7 additional keys if necessary.