Mercedes S-class W202

1993-2000 of release

Repair and car operation

Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. Ignition system
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
- 11. A steering
   11.2. The block of an inflatable pillow of safety on a steering wheel
   11.3. A steering wheel
   11.4. A steering trapeze
   11.5. Cuffs of hinges of a steering trapeze
   11.6. The pump of the hydraulic booster of a wheel
   11.7. Disorder-convergence installation
   11.8. Easily and easy
   11.9. Maintenance service of system of a steering
   11.10. Diagnostics of malfunctions of system of a steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes

11.7. Disorder-convergence installation

Optimum road performance and the minimum deterioration of rubber are reached only in the event that position of wheels is correctly exposed. At the raised and non-uniform deterioration of tyres, and also a road incontience – at bad stability of a direction and insufficient stability on turns it is necessary to address in a workshop, that by means of optical methods to expose disorder-convergence.

Disorder-convergence installation cannot be carried out without the corresponding equipment. Therefore here the basic concepts necessary for installation of disorder-convergence are described only.


As convergence is called the corner on which the wheel plane deviates a longitudinal axis of the car. The positive convergence means that wheels at measurement at height of their centres converge in front a bit more close, than behind. The negative convergence means that wheels in front disperse more than behind.

At car Mercedes both forward, and back wheels have a positive convergence: forward wheels – 025 ' (a sports suspension bracket 010 '), back wheels – 025 '.

Disorder and cross-section inclination шкворня a rotary fist

The forward bridge

St – disorder
Sp – a cross-section inclination шкворня
4 – the bottom lever of a suspension bracket
5 – a rotary fist
6 – the top lever of a suspension bracket
7 – the fist hinge
19, 20 – bolts with the clown
+/-3 – an adjusting course – 3 mm

Disorder and cross-section inclination шкворня a rotary fist reduce carrying over of pushes by a steering and provide the minimum friction on turns.

Disorder name a corner on which the wheel plane deviates a vertical. Forward wheels, thus, will defend at negative disorder in a point of a contact with road further from each other, than from above. At car Mercedes forward and back wheels have negative disorder.

The cross-section inclination шкворня is a corner between an axis of turn of a fist and a vertical in a point of standing of a wheel if to look in a longitudinal direction of the car.

Disorder and cross-section inclination шкворня a rotary fist in common define a so-called shoulder обкатки. Thanks to corresponding constructive data, the big stability in a direction is reached at braking, in particular, if wheels are on a various road covering (for example if the left wheel brakes on dry, and right – on wet road).

Longitudinal inclination шкворня back

The longitudinal inclination шкворня is a corner between an axis of turn of a fist and a vertical in a cross-section direction back. This inclination substantially influences management of forward wheels at movement on a straight line. The insignificant inclination favours to deviations from a movement direction at driving on bad roads or at a lateral wind, and on turns the wheel badly comes back in average position.

The longitudinal inclination together with disorder is exposed by means of two bolts with the clown on suspension bracket levers.

Preconditions for check

 – The ordered pressure of air in tyres;
 – The car is not loaded, but prepared for a trip: a full tank, запаска and the tool – all it should be at check;
 – Preliminary strongly to shake a suspension bracket;
 – The wheel costs directly;
 – It is adjusted люфт in suspension bracket levers;
 – It is adjusted люфт in bearings of wheels.

Check/installation of a positive convergence of forward wheels

Position of forward wheels at the sight of from above

Exact installation of disorder-convergence should be made only in a firm workshop. At unilateral deterioration of tyres basically the convergence should be checked. The convergence is checked, if parts of a steering trapeze acted in film. The convergence can be checked up rather simple means.

The above-stated preconditions for check should be observed.
1. Put wheels directly, the wheel cross-beam should be located horizontally.
2. Average position is reached when the groove on a joint of steering connection coincides with маркировочной a mark in the steering mechanism (marksman). If thus the steering wheel costs not absolutely directly, remove it and rearrange.
3. Place between forward wheels in front a sliding bar and move apart its effort nearby 100 Н (corresponds 10кГ). For this purpose use a firm special equipment or a similar bar. Раздвижка it is necessary to simulate movement when wheels aspire to be moved apart outside.
4. Measure a convergence. The general convergence of forward wheels should make 025'10 ' (for a sports suspension bracket 010'10 '). It means that rim edges in front should stand on 1 mm more close, than behind.
5. Establish a positive convergence, rotating the lever of a steering trapeze for шестигранник (10е). Preliminary release tightening a cone (10f), thus keep the lever for шестигранник рожковым a key.
6. Establish a positive convergence with an identical corner at the left and on the right, the wheel should be thus on the average position.
7. Tighten tightening a cone (10f) the moment 50 Н.м., keeping the lever of a steering trapeze for шестигранник рожковым a key. Check up a cuff of the ball hinge, it should not be crumpled or damaged. After check (installation) remove the adaptation for раздвижки wheels.