Check vehicle level at front and rear axle with electronic inclinometer, adjust if necessary

AR40.20-P-0301RT

Check vehicle level at front and rear axle with electronic inclinometer, adjust if necessary

5.8.15

Model

251

Modification notes

5.7.13

Vehicle level - rear axle

BE40.20-P-1001-03N

5.7.13

Permissible difference in vehicle level at rear axle between right and left sides of vehicle

BE40.20-P-1002-03N

4.8.15

Method adapted.

Operation step 15.1

086

Inclinometer

086a

Measuring sensor

Shown here is measuring point 1 (front left)

086a

Measuring sensor

2

Mounting points for measurement sensor

1

Transverse control arm

Shown here is measuring point 3 (rear left)

086a

Measuring sensor

3

Rear axle shaft



Check

1

Drive vehicle onto measurement platform and apply parking brake

2

Carry out preconditions and tests for vehicle level measurement

AR40.00-P-0202RT



Clean

3

Clean mounting points for measurement sensor (2) on left and right transverse control arms (1) of front axle

4

Clean left and right rear axle shafts (3)



Measure using pointer device

5

Position measurement sensor (086a) with measurement feet onto three application points for measurement sensor (2) at measuring point 1 (front left)



000 588 05 19 00 Inclinometer

WS40.00-P-0007B


Connecting cable on measurement sensor (086a) must face towards vehicle center (arrow).
Otherwise, the measurement will be inaccurate.

6

Measure vehicle level using inclinometer (086) at measuring point 1 (front left) and store measured value



000 588 05 19 00 Inclinometer

WS40.00-P-0007B

Vehicle level - front axle

*BE40.20-P-1001-02N

7

Repeat operation steps 5 and 6 at measuring point 2 (front right)



000 588 05 19 00 Inclinometer

WS40.00-P-0007B

Vehicle level - front axle

*BE40.20-P-1001-02N

8

Position measurement sensor (086a) on left rear axle shaft (3)



000 588 05 19 00 Inclinometer

WS40.00-P-0007B


Connecting cable on measurement sensor (086a) must face towards vehicle center (arrow).
Otherwise, the measurement will be inaccurate.

9

Measure vehicle level on rear axle using inclination of rear axle shaft (3) and store measurement value



000 588 05 19 00 Inclinometer

WS40.00-P-0007B

Vehicle level - rear axle

*BE40.20-P-1001-03N

10

Repeat operation steps 8 and 9 on right rear axle shaft (3)



000 588 05 19 00 Inclinometer

WS40.00-P-0007B

Vehicle level - rear axle

*BE40.20-P-1001-03N



Check

11

Check maximum permissible difference in vehicle level between left and right side of vehicle

 The specified test tolerance applies only when checking the vehicle level but not for calibration.

Permissible difference in vehicle level at rear axle between right and left side of vehicle

*BE40.20-P-1002-03N

Permissible difference in vehicle level between right and left side of vehicle

*BE40.20-P-1002-02N

12

Transfer the measurements from the inclinometer (086) into the wheel alignment system

 Only when performing wheel alignment.

Adjust

13

Remove front axle spring

If adjustment operations on the front axle are required.

Model 251
except code 489 (AIRMATIC)

AR32.20-P-0200RT

14

Remove rear axle spring

If adjustment operations on the rear axle are required.

Model 251
except code 489 (AIRMATIC)

AR32.20-P-0230GZ

15.1

Adjust vehicle level

Model 251
except code 489 (AIRMATIC)
If adjustment operations are required.

AR40.20-P-0301-02GQ

Vehicle level - rear axle

*BE40.20-P-1001-03N

Vehicle level - front axle

*BE40.20-P-1001-02N

Vehicle level adaptation

*BE40.20-P-1001-11C

Vehicle level adaptation

*BE40.20-P-1001-12B

Permissible difference in vehicle level between right and left side of vehicle

*BE40.20-P-1002-02N

Permissible difference in vehicle level at rear axle between right and left side of vehicle

*BE40.20-P-1002-03N

15.2

Calibrate vehicle level using diagnostic system

Model 251
with code 489 (AIRMATIC)
If adjustment operations are required.



AD00.00-P-2000-04A

Vehicle level - rear axle

*BE40.20-P-1001-03N

Vehicle level - front axle

*BE40.20-P-1001-02N

If the vehicle level is not OK after calibration.



Check level sensor and mounting of level sensor.



Measure using pointer device

16

Remeasure vehicle level and adjust if necessary

Only if the vehicle level was adjusted.

Concluding tasks

17

Adjust the zero position of the xenon headlamps

Model 251
with code 614 (Bi-xenon headlamps)
Model 251
with code 615 (Bi-xenon headlamps with active light function)
Model 251
with code 616 (Bi-xenon headlamp unit with integrated asymmetric curve illumination)
Model 251
with code 618 (Bi-xenon headlamps)
Only when vehicle level is to be adjusted.



AD00.00-P-2000-04A

18

Check headlamp adjustment and correct if necessary

Only if the vehicle level was adjusted.



AP82.10-P-8260RT

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 ECE+USA with front+rear steel suspension, except code 847

Model 251 ECE+USA with front+rear steel suspension, with code 847

BE40.20-P-1001-02N

Vehicle level - front axle

°

+2,97° (1,3°)

+3,35° (1,3°)

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 ECE with front steel suspension and rear air suspension

Model 251 USA with front steel suspension and rear air suspension

BE40.20-P-1001-02N

Vehicle level - front axle

°

+3,98° (1,3°)

+5,37° (1,3°)

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 with air suspension

Model 251 AMG

BE40.20-P-1001-02N

Vehicle level - front axle

°

+1,07° (1,3°)

+0,69° (1,3°)

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 ECE+USA with front+rear steel suspension, except code 847

Model 251 ECE+USA with front+rear steel suspension, with code 847

BE40.20-P-1001-03N

Vehicle level - rear axle

°

–1,94° (0,9°)

–1,94° (0,9°)

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 ECE with front steel suspension and rear air suspension

Model 251 USA with front steel suspension and rear air suspension

BE40.20-P-1001-03N

Vehicle level - rear axle

°

–3,81° (0,9°)

–3,81° (0,9°)

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 with air suspension

Model 251 AMG

BE40.20-P-1001-03N

Vehicle level - rear axle

°

–4,19° (0,9°)

–4,47° (0,9°)

Front axle alignment

Number

Designation

Model 251

BE40.20-P-1001-11C

Vehicle level adaptation

Shim 1

Thickness

mm

1,50

Adaptation (height)

mm

2,46

Adaptation (Romess)

°

0,31

Shim 2

Thickness

mm

2,00

Adaptation (height)

mm

3,28

Adaptation (Romess)

°

0,42

Shim 3

Thickness

mm

5,00

Adaptation (height)

mm

8,20

Adaptation (Romess)

°

1,04

Shim 4

Thickness

mm

10,00

Adaptation (height)

mm

16,40

Adaptation (Romess)

°

2,08

Rear axle alignment

Number

Designation

Model 251

BE40.20-P-1001-12B

Vehicle level adaptation

Shim 1

Thickness

mm

1,50

Adaptation (height)

mm

2,73

Adaptation (Romess)

°

0,26

Shim 2

Thickness

mm

2,00

Adaptation (height)

mm

3,64

Adaptation (Romess)

°

0,34

Shim 3

Thickness

mm

5,00

Adaptation (height)

mm

9,10

Adaptation (Romess)

°

0,85

Shim 4

Thickness

mm

10,00

Adaptation (height)

mm

18,20

Adaptation (Romess)

°

1,70

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 ECE+USA with front+rear steel suspension, except code 847

Model 251 ECE+USA with front+rear steel suspension, with code 847

BE40.20-P-1002-02N

Permissible difference in vehicle level between right and left side of vehicle

°

0,6

0,6

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 ECE with front steel suspension and rear air suspension

Model 251 USA with front steel suspension and rear air suspension

BE40.20-P-1002-02N

Permissible difference in vehicle level between right and left side of vehicle

°

0,6

0,6

Test and adjustment values for vehicle level at front axle

Number

Designation

Model 251 with air suspension

Model 251 AMG

BE40.20-P-1002-02N

Permissible difference in vehicle level between right and left side of vehicle

°

0,6

0,6

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 ECE+USA with front+rear steel suspension, except code 847

Model 251 ECE+USA with front+rear steel suspension, with code 847

BE40.20-P-1002-03N

Permissible difference in vehicle level at rear axle between right and left side of vehicle

°

0,5

0,5

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 ECE with front steel suspension and rear air suspension

Model 251 USA with front steel suspension and rear air suspension

BE40.20-P-1002-03N

Permissible difference in vehicle level at rear axle between right and left side of vehicle

°

0,5

0,5

Test and adjustment values for vehicle level at rear axle

Number

Designation

Model 251 with air suspension

Model 251 AMG

BE40.20-P-1002-03N

Permissible difference in vehicle level at rear axle between right and left side of vehicle

°

0,5

0,5