Car Access System: Introduction

The Car Access System (CAS) controls access to the vehicle.

The CAS control unit is the master control unit, e.g. for the following systems:

• Electronic immobilizer
• Central locking system
• Comfort Access
• Electronic steering lock
• Power windows

The CAS is constructed differently in the various model series.

• E60, E61, E63, E64 until 09/2005:

  The CAS and the ignition starter switch are 2 separate components.

• E60, E61, E63, E64 from 09/2005:

  Ignition starter switch and conventional ignition key discontinued. The slot for the remote control and the START/STOP button are new features.

• E70, E81, E87, E90, E91, E92, E93 from start of series production:

  Slot and START/STOP button