Seat adjustment, function - GF91.29-P-2005GZ
MODEL 164, 251 with CODE (242) Electrically adjustable front passenger seat with memory with CODE (275) Memory package (driver seat, steering column, mirrors) up to Model Year 8
Function requirements
Circuit 15R ON or respective front door open (up to 31.5.07)
Function
Actuation of the switch group, which is located on the front seat frame trim, is read in voltage-coded by each front seat adjustment control unit. The front seat adjustment control unit actuates the corresponding seat adjustment motors directly.
To adjust, press and hold down switches on the switch group until the desired position is reached.
Abort conditions:
Overvoltage or under voltage
Adjustment function & direction
Forward/back adjustment - Forward, back
Height adjustment (rear) - Up, down
Inclination adjustment - Up, down
Head restraint adjustment - Up, down
Backrest adjustment - Forward, back
Priorities
The switch group is designed so that adjustment in group 1 is independent of any switch actuation in group 2 or group 3. If several adjustment requests are received in a group by the front seat adjustment control unit, then the adjustment request with the higher priority is executed. A maximum of three motors (one motor per group) can be adjusted simultaneously.
See following chart.
| Priorities | Group 1 | Group 2` |
|---|---|---|
| High 1 | Backrest forward/back | Forward/back adjustment |
| Center 2 | Head restraint adjustment | Height adjustment, rear (height) |
| Low 3 | Inclination adjustment |
| Front seat adjustment motor group with memory, component description | M27/1, M27/2, M27/3, M27/4 M27/5; M28/1, M28/2, M28/3, M28/4 M28/5 (with code (242) Electrically adjustable front passenger seat with memory) |
GF91.29-P-5219GZ |
| Component description of driver-side front seat adjustment control unit with memory | N31/1 | GF91.29-P-5223RT |
| Component description of passenger-side front seat adjustment control unit with memory | N32/2 With code (242) Electrically adjustable front passenger seat with memory |
GF91.29-P-5224RT |
| Front seat adjustment switch group, component description | S91; S92 (with code (242) Electrically adjustable front passenger seat with memory) |
GF91.29-P-5220GZ |