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

MODEL 164.1

with CODE (489) Airmatic (air suspension with level adjustment and adaptive damping system ADS)

with CODE (430) Offroad package

with CODE (494) USA version

Fig 1: Identifying AIRmatic Level Adjustment Components (Model 164.1)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

The vehicle is raised or lowered depending on the ground speed and setting of the level adjustment high switch, level adjustment low switch and the Comfort/Sport switch (ADS). 5 vehicle level stages are possible:

Offroad 3 vehicle level
Offroad 2 vehicle level
Offroad 1 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.

Fig 2: Level Adjustment High Switch In ADS Mode "AUTO"
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Level adjustment high switch actuated once in ADS mode "AUTO"

Function requirements:

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

Function:

Shortly after pressing the level adjustment high switch once the vehicle is moved to offroad level 1 (± 0 mm).
Display in the multifunction display (A1p13) of the instrument cluster (A1): "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest LED in the level control function indicator lights up and indicates that the vehicle is in offroad level 1.
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, the "offroad level 1" 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 < 25 mph, the vehicle is moved back to the highway level (-30 mm).

If v > 65 mph is not exceeded for longer than 20 s, the vehicle will remain at offroad level 1 until it is lowered to highway level again by pressing the level adjustment low switch.

Level adjustment high switch pressed twice in ADS mode "AUTO"

Function requirements:

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

Function:

Shortly after pressing the level adjustment high switch twice the vehicle is moved to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 2.
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, the "offroad level 1" 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 < 25 mph, the vehicle is moved back to the highway level (-30 mm).
If v > 40 mph is not exceeded for longer than 20 s, the vehicle will remain at offroad level 2 until it is lowered to offroad level 1 or highway level again by pressing the level adjustment low switch.

Level adjustment high switch pressed three times in ADS mode "AUTO"

Function requirements:

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

Function:

Shortly after actuating the level adjustment high switch three times the vehicle is moved to the offroad level 3 (+80 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle and uppermost LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 3.
At a velocity of v > 20 mph, the "offroad level 3" driver command is canceled immediately and the vehicle is automatically lowered to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, offroad level 1 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 < 25 mph, the vehicle is moved back to the highway level (-30 mm).
If v > 20 mph is not exceeded, the vehicle will remain at offroad level 3 until it is lowered to offroad level 2, offroad level 1 or highway level again by pressing the level adjustment low switch.

Level adjustment low switch not actuated in ADS mode "AUTO"

Function requirements:

Engine running

Function

The vehicle can be lowered from all offroad levels manually by the driver irrespective of time and velocity thresholds.

Level adjustment high switch or level adjustment low switch not actuated in ADS mode "AUTO"

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.

Fig 3: Level Adjustment High Switch ADS Mode "SPORT"
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Level adjustment high switch actuated once in ADS mode "SPORT"

Function requirements:

Engine running
The vehicle is in the high speed level (-45 mm).

Function:

Shortly after pressing the level adjustment high switch once the vehicle is moved to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest LED in the level control function indicator lights up and indicates that the vehicle is in offroad level 1.
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, the "offroad level 1" driver command 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".

Level adjustment high switch pressed twice in ADS mode "SPORT"

Function requirements:

Engine running
The vehicle is in the high speed level (-45 mm).

Function:

Shortly after pressing the level adjustment high switch twice the vehicle is moved to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 2.
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, offroad level 1 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".

Level adjustment high switch pressed three times in ADS mode "SPORT"

Function requirements:

Engine running
The vehicle is in the high speed level (-45 mm).

Function:

Shortly after actuating the level adjustment high switch three times the vehicle is moved to the offroad level 3 (+80 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle and uppermost LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 3.
At a velocity of v > 20 mph, the "offroad level 3" driver command is canceled immediately and the vehicle is automatically lowered to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, offroad level 1 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".

Level adjustment switch not actuated in ADS mode "SPORT"

Function requirements:

Engine running

Function:

The vehicle remains in high speed level if when driving straight ahead the ADS mode "SPORT" setting is selected.

Fig 4: Level Adjustment High Switch In ADS Mode "COMFORT"
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Level adjustment high switch actuated once in ADS mode "COMFORT"

Function requirements:

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

Function:

Shortly after the level adjustment high switch is pressed, the vehicle is moved to the offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. When this is completed, the lowest LED in the level control function indicator lights up, the vehicle is in offroad level 1.
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, offroad level 1 is canceled and the vehicle is lowered to the highway level (-30 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 110 mph, 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 < 25 mph, the vehicle is moved back to the highway level (-30 mm).
If v > 65 mph is not exceeded for longer than 20 s, the vehicle will remain at offroad level 1 until it is lowered to highway level again by pressing the level adjustment low switch.

Level adjustment high switch pressed twice in ADS mode "COMFORT"

Function requirements:

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

Function:

Shortly after pressing the level adjustment high switch twice the vehicle is moved to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 2.
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, the "offroad level 1" driver command is canceled and the vehicle is automatically lowered to the highway level (-30 mm).
Display in malfunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 110 mph, 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 > 110 mph, the vehicle is automatically lowered to the high speed level (-45 mm).
At v < 25 mph, the vehicle is moved back to the highway level (-30 mm).
If v > 40 mph is not exceeded for longer than 20 s, the vehicle will remain at offroad level 2 until it is lowered to offroad level 1 or highway level again by pressing the level adjustment low switch.

Level adjustment high switch pressed three times in ADS mode "COMFORT"

Function requirements:

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

Function:

Shortly after actuating the level adjustment high switch three times the vehicle is moved to the offroad level 3 (+80 mm).
Display in the multifunction display of the instrument cluster: "vehicle rising", the LED in the level control function indicator flashes during the adjusting procedure. Once the adjustment process has been completed, the lowest and middle and uppermost LEDs in the level control function indicator light up and indicate that the vehicle is in offroad level 3.
At a velocity of v > 20 mph, the "offroad level 3" driver command is canceled immediately and the vehicle is automatically lowered to offroad level 2 (+50 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
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 "offroad level 2" driver command is canceled and the vehicle is automatically lowered to offroad level 1 (± 0 mm).
Display in the multifunction display of the instrument cluster: "Level selection canceled".
At a velocity of v > 65 mph for longer than t = 20 s or if the velocity threshold limit v = 70 mph is exceeded, offroad level 1 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 > 110 mph, 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 > 110 mph, the vehicle is automatically lowered to the high speed level (-45 mm).
At v < 25 mph, the vehicle is moved back to the highway level (-30 mm).
If v > 20 mph is not exceeded, the vehicle will remain at "offroad level 3" until it is lowered to offroad level 2, offroad level 1 or highway level again by pressing the level adjustment low switch.

Level adjustment low switch not actuated in ADS mode "COMFORT"

Function requirements:

Engine running

Function

The vehicle can be lowered from all offroad levels manually by the driver irrespective of time and velocity thresholds.

Level adjustment switch not actuated in ADS mode "COMFORT"

Function requirements:

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

Function:

At v > 110 mph, 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.

Trailer operation

Function requirements:

Engine running
Trailer operation detected by AIRmatic control unit (N51)

Function

A trailer mode has been detected and this in turn influences the AIRmatic system as follows:

Vehicle runs at highway level only.
High speed level no longer accessible.
If the driver fails to lower the vehicle manually, the vehicle is automatically lowered to the highway level at 5 mph or lower.

The trailer can only be unhitched from the vehicle when the AIRmatic control unit is active. This is not necessary for a trailer with low tongue weight capacity.

Comfort/Sport switch (ADS)

The driver can program the damping level as desired using the Comfort/Sport switch (ADS):

"AUTO" Skyhook mode
"SPORT" Firm damping
"COMFORT" Soft damping

If the driver command "SPORT" is selected, and if the level adjustment high switch is not actuated the vehicle is lowered automatically to the high speed level.

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