Seat adjustment, rear seats

Depending on equipment, the following adjustments to the seats are possible:

• Seat fore/aft adjustment
  
• Seat angle adjustment
  
• Seat depth adjustment
  
• Seat angle adjustment
  
• Headrest adjustment
  
• Headrest adjustment
  

Brief description of components

Seat module, rear driver's side / rear passenger side

The seat modules are fitted in the luggage compartment.

The seat modules are networked with the vehicle via the CAN BUS.

Rear centre console switch centre

The control unit rear centre console switch centre has the following functions:

• CAN BUS interface to the vehicle electrical system
  
• Interface to the seat switches
  

The control unit rear centre console switch centre is fitted in the rear centre armrest.

Operating switch rear driver's side / rear passenger side

Depending on the equipment, various switch blocks are fitted.

The switch blocks are connected by means of ribbon cables to the rear centre console switch centre (BZMF).

Hall sensors, seat position

With the seat memory equipment, servomotors with Hall sensors are fitted.

Main functions

Seat adjustment

The seats are adjusted by operating the corresponding switch.

• The adjustment command is transferred from the switch block to the BZMF across a ribbon cable.
  
• The BZMF sends the message across the K-CAN SYSTEM to the Car Access System (CAS).
  
• The CAS as ”gateway control unit” passes the message on to the corresponding seat module via the K-CAN PERIPHERALS.
  
• The seat module activates the adjustment motor directly via its final stages.
  

In the case of the comfort rear seat, the headrest adjustment is a function of the seat angle adjustment.

In the case of the special equipment rear compartment safety package, the headrests are raised automatically when the following are detected

• seat occupied
  
• terminal R ON
  

If seat occupation is no longer detected or terminal R is switched off, the headrests are lowered again.

Operation of the seat memory

Programming

Seat positions can only be programmed as of terminal R.

Saving a seat position:

• Press the memory key ”M”: The programming readiness is active for 7 seconds.
  Programming readiness is indicated by the memory button lighting up.
  
• Press position button: adoption of current position of seat.
  

Retrieval

Pressing the desired position button causes the drives to move into the corresponding position.

Setting the passenger seat from the rear

The passenger seat can be set from the rear of the car interior:

• Press the seat ”<-->” button to activate the function
  
• Press the seat switch within 10 seconds
  

If no adjustment is carried out within 10 seconds, the adjustment switches back to the rear seat.

Child safety lock

The safety switch for the power windows prevents adjustment of the rear seats at the same time.