12
Control strategies
The vehicle rises automatically to high level 1
at the following speeds and time thresholds:
If the system has lowered the vehicle to low
level (motorway mode), it will automatically
raise it to high level 1 when its speed drops
below 60 km/h for longer than 30 seconds.
Vehicle speed Time
<60 km/h >30 seconds
<30 km/h immediately
Control unit strategies
4Z7 907 553B
Variations to the description of control unit
4Z7 907 553A are outlined below:
• No parking level control
• Automatic raising to high level 1
Preconditions for automatic raising to high
level 1:
• The system must not be switched to
manual mode.
• Between ignition ON and OFF, the driver
must select high level 1 or high level 2
once.
243_019
Automatic lowering
Lowering processes
after 30 seconds
Automatic raising to HL1 after
30 seconds
Raising processes
Immediate raising
Speed km/h
Speed km/h
LL
NL
HL1
HL2
LL
NL
HL1
HL2
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