P40.20-2265-07
Shown on left front axle half |
1 | Bolted connections | 19d | New repair bolt | |
2 | Rear transverse control arm mounting | 19e | Remove washers | |
3 | Front transverse control arm mounting | a | The adjustment at the front of the lower transverse control arm towards the vehicle center causes a positive camber change. | |
19b | Nut | The adjustment at the rear of the lower transverse control arm towards the vehicle center causes a reduction in caster. | ||
19c | Old repair bolt | b | The adjustment at the front of the lower transverse control arm towards the outside of the vehicle causes a negative camber change. The adjustment at the rear of the lower transverse control arm towards outside of the vehicle causes an increase in caster. |
| Measure using pointer device | ||
1 | Measure vehicle level at the front and rear axle | Check vehicle level at front and rear axle with electronic inclinometer, adjust if necessary | |
2 | Carrying initial measurement of wheel alignment | Perform wheel alignment check | |
| Check | ||
3 | Read off specified values of wheel camber angle and caster angle by means of the specified value tables and compare with the result of wheel alignment | The caster angle at the front axle can only be changed by adjusting the wheel camber angle | |
The following causes may exist in the event of larger deviations in wheel camber or caster: | |||
Camber at vehicle level | |||
Permissible difference in front axle camber between right and left side of vehicle | |||
Check caster. | |||
| |||
Assign tabular value: | |||
Check caster and assign to tabular value | |||
Caster values, form | |||
Permissible difference in caster between right and left side of vehicle | |||
Absolute caster tolerance | |||
4 | Check for unacceptable deformation on body | Checking accident vehicles and vehicles possibly damaged in an accident | |
Adjust | |||
5 | Loosen bolted connections (1) on transverse control arm mountings (2, 3) | Only if it is necessary to correct the camber angle and/or caster angle. | |
6 | Remove bolts of stabilizer bar bracket to axle/engine subframe and swivel the stabilizer bar downwards | Only if the wheel camber angle at the front transverse control arm mounting needs to be corrected. | |
Remove stabilizer bar carefully as it is pre-loaded | |||
Bolt, stabilizer bar bracket to axle/engine subframe | |||
7 | Install repair bolt (19c, 19d) on front or rear transverse control arm mounting | Only if the wheel camber angle or caster cannot be adjusted. | |
On front axle carriers with lock tabs on both sides of the front transverse control arm mounting, only the new repair bolt (19d) may be used. | |||
The old repair bolt (19c) can be replaced with the new repair bolt (19d). | |||
8 | Tighten nut (19b) | The repair bolt (19c, 19d) must not turn after fixing. When tightening the nut (19b) counterhold the repair bolt (19c, 19d) otherwise the lock tabs in the front axle carrier may be damaged. | |
9 | Tighten bolted connections (1) of transverse control arm mountings (2, 3) | Installation: | |
Only if wheel camber angle and/or caster angle have been corrected. | |||
Self-locking nut, lower front transverse control arm to front axle carrier | |||
Bolt, lower transverse control arm at inside rear to front axle carrier | |||
Bolt, lower transverse control arm at outside rear to front axle carrier | |||
| Measure using pointer device | ||
10 | Carrying final measurement of wheel alignment | Perform wheel alignment check | |
Only if the camber was adjusted. |
Test and adjustment values for front axle camber |
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-1001-13M | Camber at vehicle level | –0.20° | ° | – | – |
-0.58° | ° | – | – | ||
+0.69° | ° | – | – | ||
+1.07° | ° | – | – | ||
+1.70° | ° | –0° 53' (30') | – | ||
+1.95° | ° | – | – | ||
+2.08° | ° | – | –0° 50' (30') | ||
+2.33° | ° | – | – | ||
+2.71° | ° | – | – | ||
+2.97° | ° | –0° 43' (30') | – | ||
+3.35° | ° | – | –0° 40' (30') | ||
+3.98° | ° | – | – | ||
+4.11° | ° | – | – | ||
+4.23° | ° | –0° 34' (30') | – | ||
+4.61° | ° | – | –0° 31' (30') | ||
+5.24° | ° | – | – | ||
+5.37° | ° | – | – | ||
+6.64° | ° | – | – |
Test and adjustment values for front axle camber |
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-1001-13M | Camber at vehicle level | –0.20° | ° | – | – |
-0.58° | ° | – | – | ||
+0.69° | ° | – | – | ||
+1.07° | ° | – | – | ||
+1.70° | ° | – | – | ||
+1.95° | ° | – | – | ||
+2.08° | ° | – | – | ||
+2.33° | ° | – | – | ||
+2.71° | ° | –0° 45' (30') | – | ||
+2.97° | ° | – | – | ||
+3.35° | ° | – | – | ||
+3.98° | ° | –0° 35' (30') | – | ||
+4.11° | ° | – | –0° 35' (30') | ||
+4.23° | ° | – | – | ||
+4.61° | ° | – | – | ||
+5.24° | ° | –0° 28' (30') | – | ||
+5.37° | ° | – | –0° 27' (30') | ||
+6.64° | ° | – | –0° 21' (30') |
Test and adjustment values for front axle camber |
Number | Designation | Model 251 with air suspension | Model 251 AMG | ||
BE40.20-P-1001-13M | Camber at vehicle level | –0.20° | ° | –1° 12' (30') | – |
-0.58° | ° | – | –1° 16' (30') | ||
+0.69° | ° | – | –1° 3' (30') | ||
+1.07° | ° | –0° 59' (30') | – | ||
+1.70° | ° | – | – | ||
+1.95° | ° | – | –0° 51 (30') | ||
+2.08° | ° | – | – | ||
+2.33° | ° | –0° 48' (30') | – | ||
+2.71° | ° | – | – | ||
+2.97° | ° | – | – | ||
+3.35° | ° | – | – | ||
+3.98° | ° | – | – | ||
+4.11° | ° | – | – | ||
+4.23° | ° | – | – | ||
+4.61° | ° | – | – | ||
+5.24° | ° | – | – | ||
+5.37° | ° | – | – | ||
+6.64° | ° | – | – |
Test and adjustment values for front axle camber |
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-1002-13M | Permissible difference in front axle camber between right and left side of vehicle | ° | 19' | 19' |
Test and adjustment values for front axle camber |
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-1002-13M | Permissible difference in front axle camber between right and left side of vehicle | ° | 19' | 19' |