Note. Separate characteristics are also given in the text of the Chapter and, if they are mandatory, are highlighted in bold.
Common parameters | |
Wheelbase, track, turning diameter, mm | See Specifications for Chapter Controls and techniques for safe operation |
Bridges | |
Control dimensions of the geometric parameters of the installation of the front and rear axles, mm | |
V1, V2, V3, H8, H9, H10 | 3 |
Front suspension | |
Design | Fully independent, 4-link, with telescopic shock absorbers, torsion springs, subframe and anti-roll bar (torsion bar). |
Rear suspension | |
Design | Fully independent, multi-link, rack type (telescopic dampers and coil springs), with subframe and stabilizer bar (torsion bar). |
Steering | |
Design | |
Drive unit | Hydraulically reinforced rack and pinion with a valve inlet assembly and two tie rods, hydraulic reinforcement is organized according to a scheme sensitive to vehicle speed (SPS) |
Steering column | Safety, telescopic, with the function of displacement during landing and tilt adjustment |
Steering gear | With swirling balls |
The number of turns of the steering wheel when turning from lock to lock | 2.8 |
Type and volume of power steering fluid See | Specifications for the Chapter Ongoing care and maintenance |
Pressure in the power steering tract, bar | 92÷100 |
Ground clearance | |
Control Angle | |
| |
| 6.4° |
| 4.0° |
| |
| 4.7° ± 1.0° |
| 2.9° |
Wheel alignment | |
Front wheels | |
Convergence | |
| 0°10' ± 10' |
| 2°06' ± 30' |
Camber depending on the setting of the ground clearance of the front axle (with tolerance±20') | |
Rated values | |
Except ML 55 AMG models | |
| -0°20' |
| -0°20' |
| -0°20' |
| -0°20' |
| -0°20' |
| -0°21' |
| -0°22' |
| -0°24' |
| -0°25' |
| -0°27' |
| -0°29' |
| -0°32' |
| -0°35' |
| -0°38' |
| -0°42' |
| -0°46' |
| -0°50' |
| -0°54' |
| -0°59' |
| -1°04' |
| -1°09' |
Models ML 55 AMG | Data not provided |
The maximum allowable difference between the camber of the right and left wheels | 20' |
Overrun depending on the axle clearance setting (tolerance±30') | |
| See Table 1 |
| Data not provided |
rear wheels | |
Convergence | 0°20' ± 7' |
Camber depending on the setting of the rear axle ride height (with tolerance±20') | |
Rated values | |
Except ML 55 AMG models | |
| -0°52' |
| -0°48' |
| -0°45' |
| -0°44' |
| -0°40' |
| -0°37' |
| -0°35' |
| -0°33' |
| -0°32' |
| -0°31' |
| -0°30' |
| -0°29' |
| -0°29' |
| -0°29' |
| -0°29' |
| -0°30' |
| -0°31' |
| -0°32' |
| -0°33' |
| -0°35' |
| -0°37' |
Models ML 55 AMG | Data not provided |
The maximum allowable difference between the camber of the right and left wheels | 20' |
Overrun depending on the axle clearance setting (with tolerance±0.5°) | See Table 2 |
Except ML 55 AMG models | See Table 2 |
Tightening force of threaded connections, Nm | |
Front suspension | |
Bolts of fastening of a subframe to a car frame | 200 |
Self-locking bolts securing propshaft to front differential coupling flange | 40 |
Bolts of fastening of shock-absorbers to the lower cross-section levers | 130 |
Self-locking nuts for fastening shock absorbers to the longitudinal beams of the frame | 30 |
Nuts of bolts of fastening of racks of the stabilizer of cross stability (torsion bar) to the frame | 100 |
Bolts of fastening of a bar of the stabilizer of cross-section stability (torsion bar) to the cross arms | 68 |
Nuts of bolts of fastening of mounting brackets of racks of the stabilizer of cross-section stability (torsion bar) | 50 |
Nut of a bolt of a coupling collar of fixing of a torsion bar | 15 |
Bolts of profile bushings of torsion springs | 23 |
Screws of end covers of persistent levers of torsion springs | 23 |
Bolts of fastening of the lower cross-section levers to a subframe | |
| 135 |
| 30 |
Self-locking nuts for fastening the upper ball bearings in the steering knuckles | 50 |
Castellated nuts for fastening the lower ball joints in the steering knuckles | 300 |
Bolts of fastening of the top cross-section levers to a frame | 120 |
Rear suspension | |
Self-locking subframe-to-frame bolts | 200 |
Self-locking nuts securing shock absorbers to lower control arms | 85 |
Self-locking nuts for fastening the shock absorbers to the side beams of the frame | 20 |
Bolts / nuts securing the control link to the subframe and frame | 20 |
Self-locking nuts securing the upper transverse arms to the frame side rails | 120 |
Self-locking nuts for fastening the upper ball bearings in hub assemblies | 50 |
Castellated nuts for fastening the lower ball joints in hub assemblies | 300 |
Drain plug rear differential | 50 |
Self-locking bolts securing the rear driveshaft to the rear differential coupling flange | 50 |
Bolts of fastening of a longitudinal bracket of fixing of a fuel tank | 20 |
Nuts of connecting bolts of fastening of the stabilizer bar (torsion bar) to the lower control arms | 28 |
Bolts of collars of fastening of a bar of the stabilizer of cross-section stability to a subframe | 28 |
Self-locking nuts securing the lower transverse arms to the subframe | 135 |
Self-locking nuts for fastening shock absorbers to helical springs of strut assemblies | 30 |
Self-locking nuts for fastening the lower ball joints to the transverse levers | 125 |
Self-locking nuts for fastening the longitudinal braces to the subframe | 100 |
Self-locking nuts for fastening longitudinal braces to hub assemblies | 55 |
Steering | |
Self-locking nuts for fastening the steering input assembly to the steering column shaft and rack and pinion | 28 |
Threaded fittings for connecting pressure and return lines to the steering gear housing | 15 |
Hollow bolts of nipple connectors of pressure and return lines on the crankcase of the steering gear | 33 |
Fastening the pressure line of the hydraulic tract of the power steering to the steering pump (M16x1.5) | 45 |
Return line attachment to steering pump | 2 |
Pump Assembly Tandem Component Pressure Hose | 25 |
Steering pump mounting bolts | |
Standard | 25 |
Self-tapping | |
| 35 |
| 20 |
Self-locking nuts for fastening the tie rod ends to the steering knuckles | 55 |
Locknuts for fixing the steering rods in the inner tips | 50 |
Fastening the inner tie rod ends to the steering rack | 110 |
Bolts of fastening of the steering mechanism to a subframe | 50 |
Nut of fastening of the lever of adjustment of a steering column | 4 |
Bolt of fastening of the contact switch to the lever of adjustment of a steering column | 1 |
Bolt of fastening of a steering wheel to a steering column shaft | 80 |
Bolts of fastening of a shirt of a steering column (upper and lower) | 20 |
Tab. 1
Ground clearance front axle | Front wheel runout | ||||||||||||||||
hail | mm | ||||||||||||||||
1.6 | -22.6 | 6 ° 06' | 6 ° 12' | 6 ° 18' | 6 ° 23' | 6 ° 26' | 6 ° 32' | 6 ° 38' | 6 ° 44' | 6 ° 50' | 6 ° 53' | 6 ° 59' | 7 ° 06' | 7 ° 11' | 7 ° 14' | ||
2.0 | -19.7 | 6 ° 04' | 6 ° 10' | 6 ° 16' | 6 ° 22' | 6 ° 25' | 6 ° 31' | 6 ° 37' | 6 ° 43' | 6 ° 49' | 6 ° 52' | 6 ° 57' | 7 ° 03' | 7 ° 09' | 7 ° 12' | ||
2.4 | -16.6 | 6 ° 02' | 6 ° 08' | 6 ° 14' | 6 ° 20' | 6 ° 23' | 6 ° 29' | 6 ° 36' | 6 ° 41' | 6 ° 47' | 6 ° 50' | 6 ° 56' | 7 ° 02' | 7 ° 07' | 7 ° 10' | ||
2.8 | -13.9 | 6 ° 01' | 6 ° 07' | 6 ° 13' | 6 ° 18' | 6 ° 22' | 6 ° 28' | 6 ° 34' | 6 ° 40' | 6 ° 45' | 6 ° 48' | 6 ° 54' | 7 ° 00' | 7 ° 06' | 7 ° 09' | ||
3.2 | -10.9 | 6 ° 00' | 6 ° 05' | 6 ° 11' | 6 ° 17' | 6 ° 20' | 6 ° 26' | 6 ° 32' | 6 ° 38' | 6 ° 43' | 6 ° 46' | 6 ° 52' | 6 ° 58' | 7 ° 04' | 7 ° 07' | ||
3.6 | -8.0 | 5 ° 58' | 6 ° 04' | 6 ° 09' | 6 ° 15' | 6 ° 18' | 6 ° 24' | 6 ° 30' | 6 ° 36' | 6 ° 42' | 6 ° 44' | 6 ° 50' | 6 ° 56' | 7 ° 02' | 7 ° 06' | ||
4.0 | -5.1 | 5 ° 56' | 6 ° 02' | 6 ° 08' | 6 ° 13' | 6 ° 16' | 6 ° 22' | 6 ° 28' | 6 ° 34' | 6 ° 40' | 6 ° 43' | 6 ° 48' | 6 ° 55' | 7 ° 01' | 7 ° 04' | ||
4.4 | -2.2 | 5 ° 54' | 6 ° 00' | 6 ° 06' | 6 ° 12' | 6 ° 15' | 6 ° 21' | 6 ° 26' | 6 ° 32' | 6 ° 38' | 6 ° 41' | 6 ° 47' | 6 ° 53' | 6 ° 59' | 7 ° 02' | ||
4.7 | 0.0 | 5 ° 53' | 5 ° 59' | 6 ° 05' | 6 ° 10' | 6 ° 14' | 6 ° 19' | 6 ° 25' | 6 ° 31' | 6 ° 37' | 6 ° 40' | 6 ° 46' | 6 ° 52' | 6 ° 58' | 7 ° 01' | ||
5.0 | 2.2 | 5 ° 52' | 5 ° 58' | 6 ° 04' | 6 ° 09' | 6 ° 12' | 6 ° 18' | 6 ° 24' | 6 ° 30' | 6 ° 36' | 6 ° 39' | 6 ° 45' | 6 ° 51' | 6 ° 57' | 7 ° 00' | ||
5.4 | 5.1 | 5 ° 50' | 5 ° 56' | 6 ° 03' | 6 ° 08' | 6 ° 11' | 6 ° 17' | 6 ° 22' | 6 ° 29' | 6 ° 34' | 6 ° 37' | 6 ° 43' | 6 ° 49' | 6 ° 55' | 6 ° 58' | ||
5.8 | 8.0 | 5 ° 48' | 5 ° 54' | 6 ° 00' | 6 ° 06' | 6 ° 09' | 6 ° 15' | 6 ° 21' | 6 ° 27' | 6 ° 33' | 6 ° 36' | 6 ° 41' | 6 ° 47' | 6 ° 53' | 6 ° 56' | ||
6.1 | 10.0 | 5 ° 47' | 5 ° 53' | 5 ° 59' | 6 ° 05' | 6 ° 08' | 6 ° 14' | 6 ° 20' | 6 ° 28' | 6 ° 32' | 6 ° 35' | 6 ° 41' | 6 ° 46' | 6 ° 52' | 6 ° 55' | ||
6.4 | 12.4 | 5 ° 46' | 5 ° 52' | 5 ° 58' | 6 ° 04' | 6 ° 07' | 6 ° 13' | 6 ° 19' | 6 ° 25' | 6 ° 30' | 6 ° 33' | 6 ° 39 | 6 ° 45' | 6 ° 51' | 6 ° 54' | ||
6.8 | 15.3 | 5 ° 44' | 5 ° 50' | 5 ° 56' | 6 ° 02' | 6 ° 05' | 6 ° 11' | 6 ° 17' | 6 ° 23' | 6 ° 29' | 6 ° 32' | 6 ° 38' | 6 ° 44' | 6 ° 49' | 6 ° 52' | ||
7.2 | 18.2 | 5 ° 43' | 5 ° 49' | 5 ° 54' | 6 ° 00' | 6 ° 03' | 6 ° 09' | 6 ° 15' | 6 ° 21' | 6 ° 28' | 6 ° 30' | 6 ° 36' | 6 ° 42' | 6 ° 48' | 6 ° 51' | ||
7.4 | 19.7 | 5 ° 41' | 5 ° 47' | 5 ° 53' | 5 ° 58' | 6 ° 02' | 6 ° 08' | 6 ° 14' | 6 ° 20' | 6 ° 27' | 6 ° 29' | 6 ° 35' | 6 ° 41' | 6 ° 47' | 6 ° 50' | ||
7.6 | 21.2 | 5 ° 41' | 5 ° 47' | 5 ° 53' | 5 ° 55' | 6 ° 02' | 6 ° 08' | 6 ° 14' | 6 ° 19' | 6 ° 26' | 6 ° 28' | 6 ° 34' | 6 ° 40' | 6 ° 46' | 6 ° 49' | ||
7.8 | 22.6 | 5 ° 40' | 5 ° 48' | 5 ° 52' | 5 ° 56' | 6 ° 01' | 6 ° 07' | 6 ° 13' | 6 ° 17' | 6 ° 25' | 6 ° 28' | 6 ° 34' | 6 ° 40' | 6 ° 45' | 6 ° 48' | ||
8.0 | 24.1 | 5 ° 39' | 5 ° 46' | 5 ° 51' | 5 ° 57' | 6 ° 00' | 6 ° 06' | 6 ° 12' | 6 ° 16' | 6 ° 24' | 6 ° 27' | 6 ° 33' | 6 ° 35' | 6 ° 44' | 6 ° 47' | ||
40.5 | 35.5 | 30.1 | 25.0 | 22.3 | 17.0 | 11.8 | 6.6 | 1.4 | -1.2 | -6.4 | -11.7 | -16.9 | -19.5 | mm | Expensive ny clearance rear axes | ||
6.5 | 5.9 | 5.3 | 4.7 | 4.4 | 3.8 | 3.2 | 2.6 | 2.0 | 1.7 | 1.1 | 0.5 | -0.1 | -0.4 | hail |
* Calculation method: Front axle clearance angle (5.8°) x rear axle clearance setting angle (2.6°) = Coast down (6°27' ± 30')
Tab. 2
Road clearance front axle | Rear wheel runout | ||||||||||||||||
hail | mm | ||||||||||||||||
1.6 | -22.6 | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | -8.0' | ||
2.0 | -19.7 | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8.1' | -8. 1 ' | -8. 1 ' | ||
2.4 | -16.6 | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8. 2 ' | -8. 2 ' | ||
2.8 | -13.9 | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8.2' | -8. 2 ' | -8. 2 ' | ||
3.2 | -10.9 | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8. 3 ' | -8. 3 ' | ||
3.6 | -8.0 | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8.3' | -8. 3 ' | -8. 3 ' | ||
4.0 | -5.1 | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8.4' | -8. 4 ' | -8. 4 ' | ||
4.4 | -2.2 | -8.4' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8. 5 ' | ||
4.7 | 0.0 | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8. 5 ' | -8. 5 ' | ||
5.0 | 2.2 | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8.5' | -8. 5 ' | -8. 5 ' | ||
5.4 | 5.1 | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8.6' | -8. 6 ' | -8. 6 ' | ||
5.8 | 8.0 | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8. 7 ' | -8. 7 ' | ||
6.1 | 10.0 | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8.7' | -8. 7 ' | -8. 7 ' | ||
6.4 | 12.4 | -8.7' | -8.7' | -8.7' | -8.7' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8. 8 ' | ||
6.8 | 15.3 | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8.8' | -8. 8 ' | -8. 8 ' | ||
7.2 | 18.2 | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8. 9 ' | -8. 9 ' | ||
7.4 | 19.7 | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8. 9 ' | -8. 9 ' | ||
7.6 | 21.2 | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8.9' | -8. 9 ' | -8. 9 ' | ||
7.8 | 22.6 | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9. 0 ' | -9. 0 ' | ||
8.0 | 24.1 | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9.0' | -9. 0 ' | -9. 0 ' | ||
40.5 | 35.5 | 30.1 | 25.0 | 22.3 | 17.0 | 11.8 | 6.6 | 1.4 | -1.2 | -6.4 | -11.7 | -16.9 | -19.5 | mm | Expensive ny clearance rear axes | ||
6.5 | 5.9 | 5.3 | 4.7 | 4.4 | 3.8 | 3.2 | 2.6 | 2.0 | 1.7 | 1.1 | 0.5 | -0.1 | -0.4 | hail |
* Calculation method: Front axle clearance angle (5.0°) x rear axle clearance setting angle (3.2°) = Coast down (8°5' ± 0,5°)
Loosening problems often occur when repairing or servicing suspension and steering components «stuck» bolts and nuts. Fasteners located under the bottom of the car are constantly exposed to external influences and there is nothing surprising in the fact that over time they begin to corrode and partially collapse. The use of brute force in releasing such «stuck» fasteners are at risk of damage. To start, dampen the anti-twist element with a small amount of special penetrating fluid (type WD40), allowing the latter to thoroughly saturate the layers of rust. Use a wire brush to remove external deposits from the accessible areas of the threaded surfaces. Sometimes a sharp blow with a hammer on the nut through the drift helps to destroy the rust that fills the gaps between the turns of the threaded joint - try not to damage the threads as a result of the drift coming off. Use when unscrewing «stuck» The fastener of a long wrench allows you to significantly increase the applied torque, however, it should be remembered that the use of extension cords complete with ratchet-type drives is associated with the risk of failure of the return mechanism, not to mention the possibility of injury.
Fasteners damaged in the process of releasing must be replaced without fail.
Since most of the procedures described in this Chapter are performed on a vehicle raised above the ground, it is necessary to take care of the options for securely fixing the vehicle in a raised position in advance - prepare strong props. To jack up the car, use hydraulic rolling jacks - remember that the onboard jack included in the standard package is intended only for temporary jacking up the car when replacing a failed wheel. The hydraulic jack can also be used to hang some suspension components when performing a particular procedure.
Attention! Under no circumstances should you carry out any work under a vehicle that is only held in a raised position by a jack (ov)!