Storing frame height, function

W32.33-1119-79

1 Indicator lamp for raising/lowering at front

2 Indicator lamp for raising/lowering at rear

3 Button for raising/lowering at front On/Off

4 Button for raising/lowering at rear On/Off

5 Button for frame height M1

6 Button for frame height M2

7 Button for driving position

8 Raising button

9 Lowering button

10 Stop button

11.1 "vehicle frame above normal position" symbol

P2p1 Display of driver information system (FIS)

Y26 Front axle level control solenoid valve

Y27 Level control solenoid valve block,
2-axle vehicles

Y28 Level control solenoid valve block,
3-axle vehicles

CAN 1 vehicle CAN

CAN 3 frame CAN

11.2 "vehicle frame below normal position" symbol

A7 Base module (BM [GM])

A64 Front module (FM)

A65 Rear module (HM)

B51 Front axle position sensor

B52 Left drive axle position sensor

B53 Right drive axle position sensor

S50 Operating unit for level control

P2 Instrument (INS)

Prerequisites

 Vehicle at rest

 The operating unit for level control (S50) is activated

 Indicator lamp for raising/lowering at rear and, with full air suspension, also at the front (2 and 1) comes on

Operating procedure

1 After the raise or lower button (8 or 9) the vehicle frame is raised or lowered. In the display of driver information system (FIS) (P2p1) in the instrument (P2) the "vehicle frame above normal position"symbol or "vehicle frame below normal position" symbol (11.1 or 11.2) is actuated.

2 The rear module (HM) (A65) actuates at the drive axle the solenoid valve block for level control on 2-axle vehicles (Y27) or the solenoid valve block for level control
on 3-axle vehicles (Y28) and, with full air suspension, the solenoid valve for front axle level control (Y26).
The air spring bellows are pressurized or depressurized.

3 The vehicle frame and thus the cargo area, has reached the desired height, for example, the height of a loading ramp which is to be approached often in the near future.

4 The frame height is stored by simultaneously pressing the stop button (10) and button for frame heightM1 (5) or the button for frame height M2 (6).

 Storage can only be carried out when the vehicle is stationary. Always operate the stop button (10) first, hold button securely and then in addition press the button for frame height M1 (5) or button for frame height M2 (6).

The stored frame height can only be called up from a speed of < 30 km/h.