Scanning of switch positions, function - GF82.90-P-3001SX

MODEL 221 up to model year 08/YoM 07 

Illustrated: 

Fig 1: Identifying Multifunction Steering Wheel Components

Courtesy of MERCEDES-BENZ USA

Function 

The left multifunction steering wheel button group, OK button (S110s6), "back" and SBS off button, right multifunction steering wheel button group and VCS [SBS] on buttons can be used to actuate the multifunction display (A1p13) in the instrument cluster (A1). The button settings of the multifunction steering wheel (MFL) are read in via the steering LIN by the steering column module (N80) and forwarded from there to the chassis CAN. The number of menus is dependent on the vehicle equipment level.

List of options within right multifunction steering wheel button group and VCS [SBS] on button in descending order of their priority rating:

• Accept call
• Terminate call
• Louder
• Quieter
• Muting
• Switch on voice command

List of options within left multifunction steering wheel button group and "back" and SBS off button in descending order of their priority rating:

• Upward
• Downward
• To right
• To left
• Confirm selection (OK)
• Switch menu level ("back") or switch off voice command

Example: 

If the driver presses the "+  " pushbutton (specific function setting and volume control (S111s1)) of the multifunction steering wheel, the volume of the sound system is usually increased. However, if the multifunction display is currently showing another setting such as, e.g. the interior lights OFF delay time, this setting is changed when the driver presses the "+" pushbutton. The volume stays the same.