Check and adjust toe on rear axle

AR40.20-S-0332SA

Check and adjust toe on rear axle

26.11.2019

Model

639

with code XZ1 (Model generation 1)

Modification notes

28.02.2012

Value changed: Toe at vehicle level

Model 639 with code ZG2, XZ1

BE40.20-N-1003-10C

01.01.1970

Value changed: Toe at vehicle level

Model 639 without code CF8 with code CL0, XZ1

BE40.20-N-1004-10C

1

Cam bolt



Check

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.

AS00.00-Z-0035-01A

Topical note

General information on handling vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system

AH00.00-Z-0300-01A

1

Set zero position of air suspension

Only with code CL0 (Rear lowerable and raisable air suspension)

 Insert assembly device on rear axle and lower vehicle until it makes contact with the  assembly device. The current zero position corresponds to a clinometer angle of 0.82° on the rear axle shaft.

 Assembly device

*639589022300

2

Measure vehicle level at front and rear axles with electronic inclinometer

AR40.20-S-0302S

 Use the measured vehicle level to look up the specified values for the toe-in on the table sheet and note down these values.

With code CF7 (Comfort suspension)Toe at vehicle level

*BE40.20-N-1001-10C

Except code CF7 (Comfort suspension) except code CL0 (Rear lowerable and raisable air suspension) except code ZG2 (Permanent all-wheel drive)Toe at vehicle level

*BE40.20-N-1002-10C

With code ZG2 (Permanent all-wheel drive)Toe at vehicle level

*BE40.20-N-1003-10C

With code CL0 (Rear lowerable and raisable air suspension)Toe at vehicle level

*BE40.20-N-1004-10C

With code CF8 (Sports suspension)Toe at vehicle level

*BE40.20-N-1006-10C

Model 639.6 with code MA0 (E-CELL 60 kW)Toe at vehicle level

*BE40.20-N-1005-10C

Model 639.7 with code MA0 (E-CELL 60 kW)Toe at vehicle level

*BE40.20-N-1008-10C

3

Perform wheel alignment check

AR40.20-S-0200S

 During the wheel alignment check, the actual suspension data should be determined, irrespective of the vehicle level.
This data is measured according to the specifications of the axle alignment device manufacturer.

4

Check the toe adjustment on the right and left side of the vehicle

 Compare the toe-in values according to the vehicle level with the actual values measured during the wheel alignment check.

Adjust

5

Adjust toe

 Replace the new cam bolt (1) and nut (if not already replaced during previous operations). Raise axle half to replace cam bolt (1).
Adjust the toe to the specified value by turning the cam bolt (1) at the bearing of the left and right semi-trailing arm.

Permitted difference between right and left side of vehicle for rear-axle toe

*BE40.20-N-1007-10C

 Model 639.601/603/605/701/703/705/711/713/811/813/815Nut of bolt, semi-trailing arm to substructure

*BA35.15-N-1003-03D

Inspection values for toe-in at rear axle

Number

Designation

Model 639 with code CF7, XZ1

BE40.20-N-1001-10C

Toe at vehicle level

+5.80°



–0° 21' (10')

+4.90°



–0° 19' (10')

+4.20°



–0° 17' (10')

+3.40°



–0° 14' (10')

+2.70°



–0° 12' (10')

+2.00°



–0° 10' (10')

+1.30°



–0° 07' (10')

+0.60°



–0° 05' (10')

0.00°



–0° 03' (10')

–0.60°



–0° 01' (10')

–1.20°



+0° 02' (10')

–1.80°



+0° 04' (10')

–2.30°



+0° 06' (10')

–2.90°



+0° 08' (10')

–3.40°



+0° 10' (10')

–3.80°



+0° 12' (10')

–4.30°



+0° 14' (10')

–4.70°



+0° 15' (10')

Inspection values for toe-in at rear axle

Number

Designation

Model 639 without code CL0, CF7, ZG2, with code XZ1

BE40.20-N-1002-10C

Toe at vehicle level

+3.30°



–0° 12' (10')

+2.60°



–0° 10' (10')

+2.00°



–0° 08' (10')

+1.40°



–0° 06' (10')

+0.80°



–0° 04' (10')

+0.30°



–0° 02' (10')

–0.20°



+0° 00' (10')

–0.60°



+0° 01' (10')

–1.00°



+0° 03' (10')

–1.40°



+0° 04' (10')

–1.70°



+0° 06' (10')

–2.10°



+0° 07' (10')

–2.40°



+0° 08' (10')

–2.70°



+0° 09' (10')

–3.00°



+0° 10' (10')

–3.30°



+0° 12' (10')

–3.50°



+0° 13' (10')

–3.80°



+0° 14' (10')

Inspection values for toe-in at rear axle

Number

Designation

Model 639 with code ZG2, XZ1

BE40.20-N-1003-10C

Toe at vehicle level

+9.10°



–0° 12' (10')

+8.40°



–0° 10' (10')

+7.70°



–0° 08' (10')

+7.10°



–0° 06' (10')

+6.60°



–0° 04' (10')

+6.10°



–0° 02' (10')

+5.60°



+0° 00' (10')

+5.20°



+0° 01' (10')

+4.80°



+0° 03' (10')

+4.40°



+0° 04' (10')

+4.00°



+0° 06' (10')

+3.70°



+0° 07' (10')

+3.40°



+0° 08' (10')

+3.10°



+0° 09' (10')

+2.80°



+0° 10' (10')

+2.50°



+0° 12' (10')

+2.20°



+0° 13' (10')

+2.00°



+0° 14' (10')

Inspection values for toe-in at rear axle

Number

Designation

MODEL 639 with CODE CL0, XZ1 except CODE CF8

BE40.20-N-1004-10C

Toe at vehicle level

+0.82°



0° 05' (10')

+2.10°



–

Inspection values for toe-in at rear axle

Number

Designation

Model 639.6 with code MA0, XZ1

BE40.20-N-1005-10C

Toe at vehicle level

–10.70°



–0° 12' (10')

–9.90°



–0° 10' (10')

–9.20°



–0° 08' (10')

–8.50°



–0° 06' (10')

–7.90°



–0° 04' (10')

–7.30°



–0° 02' (10')

–6.70°



0° 00' (10')

–6.20°



+0° 01' (10')

–5.80°



+0° 03' (10')

–5.30°



+0° 04' (10')

–4.90°



+0° 06' (10')

–4.60°



+0° 07' (10')

–4.20°



+0° 08' (10')

–3.90°



+0° 09' (10')

–3.50°



+0° 10' (10')

–3.20°



+0° 12' (10')

–2.90°



+0° 13' (10')

–2.60°



+0° 14' (10')

Inspection values for toe-in at rear axle

Number

Designation

Model 639 with code CF8, XZ1

BE40.20-N-1006-10C

Toe at vehicle level

+0.90°



–0° 14' (10')

+0.20°



–0° 11' (10')

–0.40°



–0° 09' (10')

–1.00°



–0° 07' (10')

–1.50°



–0° 05' (10')

–2.00°



–0° 03' (10')

–2.50°



–0° 01' (10')

–3.00°



+0° 01' (10')

–3.40°



+0° 03' (10')

–3.70°



+0° 04' (10')

–4.10°



+0° 06' (10')

–4.40°



+0° 07' (10')

–4.70°



+0° 09' (10')

–5.00°



+0° 10' (10')

–5.30°



+0° 11' (10')

–5.60°



+0° 12' (10')

–5.90°



+0° 14' (10')

–6.20°



+0° 15' (10')

Inspection values for toe-in at rear axle

Number

Designation

Model 639 with code CF7, XZ1

Model 639 without code CL0, CF7, ZG2, with code XZ1

BE40.20-N-1007-10C

Permitted difference between right and left side of vehicle for rear-axle toe

°

10'

10'

Inspection values for toe-in at rear axle

Number

Designation

Model 639 with code ZG2, XZ1

MODEL 639 with CODE CL0, XZ1 except CODE CF8

BE40.20-N-1007-10C

Permitted difference between right and left side of vehicle for rear-axle toe

°

10'

10'

Inspection values for toe-in at rear axle

Number

Designation

Model 639.6 with code MA0, XZ1

Model 639 with code CF8, XZ1

BE40.20-N-1007-10C

Permitted difference between right and left side of vehicle for rear-axle toe

°

10'

10'

Inspection values for toe-in at rear axle

Number

Designation

MODEL 639 with CODE CF8, CL0, XZ1

MODEL 639.7 with CODE MA0, XZ1

BE40.20-N-1007-10C

Permitted difference between right and left side of vehicle for rear-axle toe

°

10'

10'

Inspection values for toe-in at rear axle

Number

Designation

MODEL 639.7 with CODE MA0, XZ1

BE40.20-N-1008-10C

Toe at vehicle level

–13.60°



–0° 21' (10')

–12.60°



–0° 19' (10')

–11.70°



–0° 17' (10')

–10.90°



–0° 14' (10')

–10.00°



–0° 12' (10')

–9.20°



–0° 10' (10')

–8.40°



–0° 07' (10')

–7.60°



–0° 05' (10')

–6.90°



–0° 03' (10')

–6.20°



–0° 01' (10')

–5.50°



+0° 02' (10')

–4.90°



+0° 04' (10')

–4.30°



+0° 06' (10')

–3.70°



+0° 08' (10')

–3.10°



+0° 10' (10')

–2.60°



+0° 12' (10')

–2.10°



+0° 14' (10')

–1.60°



+0° 15' (10')

 Control arm

Number

Designation

Model 639.601/603/605/701/703/705/711/713/811/813/815

BA35.15-N-1003-03D

Nut of bolt, semi-trailing arm to substructure

Stage 1

Nm

160

Stage 2

°

120