Overall Operation and Features of Level Control System

Overall Operation and Features of Level Control System

Graph, Vehicle Height In Relation To Vehicle Speed:

NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.

The vehicle is lowered or raised depending on the vehicle speed and the setting of the level adjustment switch (high/normal) (S77/1s2)

NOTE:
^ The switch position operated by the driver also remains stored after "ignition OFF" until it is changed manually or erased once a particular speed is exceeded.
^ Values in the illustration above have been altered on USA versions:
- "C"= + 15 mm
- "D"= + 30 mm

There are 4 alternative vehicle level stages:

Level Adjustment Switch (S77/1s2) Not Operated
- Engine running.
- Vehicle is at the normal level "A" (0 mm)
- At speeds greater than 118 km/h, vehicle level is lowered to "B" (-15 mm)
- At speeds less than 110 km/h, reset to normal level "A" (0 mm)

Level Adjustment Switch (S77/1s2) Operated In Stage 1
- Engine running.
- Vehicle is at the normal level "A" (0 mm)
- Shortly after the switch has been operated once, the higher vehicle level stage 1 "C" (+15 mm) is adjusted.
- At speeds greater than 62 km/h, lowered to normal level "A" (0 mm)
- At Speeds greater than 118 km/h, vehicle level lowered to "B" (-15 mm)
- The switch position "higher vehicle level stage 1 is erased
- At speeds less than 110 km/h, reset to normal level "A"(0 mm)
- Only if a speed of 118 km/h has not been exceeded:
- At speeds less than 58 km/h, an increase to the higher vehicle level stage 1 "C" (+15 mm) takes place.

Level Adjustment Switch (S77/1s2) Operated In Stage 2
- Engine running.
- The vehicle is at normal level "A" (0 mm)
- Shortly after the switch has been operated twice, the higher vehicle level stage 1 "C" (+15 mm) is adjusted.
- Shortly after this the higher vehicle level stage 2 "D" (+30 mm) is adjusted.
- At speeds greater than 25 km/h, lowered to higher vehicle level stage 1 "C" (+35 mm)
- At speeds greater than 62 km/h, lowered to normal level "A" (-15 mm)
- Switch position " " higher vehicle level stage 2" is erased.
- At speeds greater than 118 km/h, lowering of the vehicle level to "B" (-15 mm)
- Switch position "higher vehicle level stage 1 " is erased.
- At speeds greater than 110 km/h, reset to normal level "A" (0 mm)
- Only if a speed of 118 km/h was not exceeded:
- At speeds less than 58 km/h, an increase to the higher vehicle level stage 1 "C" (+15 mm) occurs again.
- Only if a speed of 118 km/h was not exceeded:
- When vehicle is stationary (speeds are less than 5 km/h) an increase to the higher vehicle level stage "D" (+ 30 mm) occurs again.

Special Functions Of Level Adjustment
- For customers with sharp bends to negotiate into garage entrances or those who make frequent trips on poor road surfaces, the Adaptive Damping System (ADS) control module can be reprogrammed as expressly required (refer to HHT menu "programming ")

- The higher vehicle level stage 1 (+15 mm) is then always adjusted when the switch is operated after dropping below a speed of 58 km/h, apart from when the driver erases it himself.
- In this case the control module is to be identified with a red dot.
- The higher vehicle level stage 2 is not affected by this programming.
- It is erased in each case when a speed of 62 km/h is exceeded.