AIRmatic level adjustment, function - GF32.22-P-4004GZX

MODEL 164.8 

with CODE (489) AIRmatic (air suspension with level adjustment without ADS adaptive damping system) 

with CODE (494) USA version 

The vehicle is lowered or raised depending on the ground speed and on the setting of the level adjustment switch. 3 vehicle level stages are possible:

• Raised vehicle level
• Highway vehicle level
• High speed vehicle level

The switch position operated by the driver also remains stored after "ignition OFF" until it is changed again manually or is canceled due to exceeding a certain speed threshold or time threshold.

Level adjustment switch pressed 

Function requirements: 

• Engine running
• The vehicle is in the highway level (-30 mm).

Function: 

• Shortly after actuating the level adjustment switch the vehicle is moved to the raised vehicle level (+50 mm).

  Display in the multifunction display (A1p13) of the instrument cluster (A1): "Vehicle rising", the LED in the level adjustment switch flashes on and off during the adjusting procedure and lights when at the raised level.

• At a velocity of v > 40 mph for longer than t = 20 s or if the velocity threshold limit v = 55 mph is exceeded, the "raised level" driver command is canceled and the vehicle is automatically lowered to the highway level (-30 mm).

  Display in the multifunction display of the instrument cluster: "Level selection canceled".

• At a velocity of v > 75 mph for longer than t = 20 s or if the velocity threshold limit v = 85 mph is exceeded, the highway level is canceled and the vehicle is automatically lowered to the high speed level (-45 mm).

  Display in the multifunction display of the instrument cluster: "Level selection canceled".

• At v > 85 mph, the vehicle is automatically lowered to the high speed level (-45 mm).
• At v < 40 km/h vehicle level is reset to highway level (-30 mm).

  If v > 40 mph is not exceeded for longer than 20 s, the vehicle will remain at "raised level" until it is lowered to highway level again by pressing the level adjustment switch.

Level adjustment switch not pressed 

Function requirements: 

• Engine running
• The vehicle is in the highway level (-30 mm).

Function: 

• At v > 75 mph for longer than t= 20 s or if the vehicle velocity threshold limit v = 85 mph is exceeded, the vehicle is automatically lowered to the high speed level (-45 mm).
• At v < 25 mph, the vehicle is automatically moved back to the highway level (-30 mm).

  The high speed level cannot be manually selected, this is only selected upon reaching the vehicle velocity threshold.

	Pressure supply, function		GF32.22-P-4010GZ
	Level adjustment switch, component description		GF32.31-P-5109GZ