Mercedes S-class W202
1993-2000 of release
Repair and car operation
+ 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
- 12. Brake system
12.2. Antiblocking system – ABS
12.3. The additional equipment – system ASR
12.4. Specifications of brake system
12.5. Overlays of lobbies brake колодок
+ 12.6. Overlays of back disk brakes
12.7. A support
12.8. A forward brake disk
12.9. A back brake disk
12.10. A brake liquid
12.11. Removal of air from brake system
12.12. Brake pipelines / hoses
12.13. Replacement of brake highways
12.14. Brake колодки a lay brake
12.15. Adjustment of a lay brake
12.16. The stoplight switch
12.17. Diagnostics of malfunctions of brakes
- 12.18. Wheels and tyres
12.18.2. Service of wheels and tyres
12.18.3. Diagnostics of malfunctions of tyres
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes
Replacement of wheels
At replacement of wheels is inexpedient to change a direction of rotation of tyres. For some tyres the rotation direction is specified by an arrow on a lateral face and it should be observed necessarily.
To tighten wheel bolts only динамометрическим a key. Their identical inhaling is thus provided.
To replace tyres not separately, and, at least, on one axis. Thus tyres with большей depth of a profile to mount behind.
Possible rust on a surface прилегания rims delete a wire brush. For protection of a wheel against corrosion at each dismantle slightly grease подшипниковой with greasing a place of landing of a disk wheel on a nave in front and behind.
Use of chains противоскольжения is supposed only on a back axis. Before installation of chains противоскольжения to remove wheel caps. To use only chains противоскольжения, resolved by firm Mercedes.
For cars with антипробуксовочной system ASR the switch of chains противоскольжения is used. At adjustment of height of the car to establish the car on the highest road clearance. To go with chains противоскольжения with a speed no more than 50 km/hour. On snow-covered and free from highway ice to remove chains противоскольжения.
Care of tyres
It is known that tyres have so-called "memory", and their not qualified use, for example, fast or frequent moving through stone borders or edges of rails, is quite often shown much later as their damage.
Clearing of tyres
Whenever possible do not clear the tyre a stream of steam from the steam-ejecting pump. If a nozzle of the steam-ejecting pump too close to hold at a tyre surface within several seconds there is a chaotic parabolic destruction of a rubber layer. The tyre cleared thus for safety reasons should be replaced.
Tyres which long time adjoined to oil or greasing are subject to replacement also. Tyres bulk up at first on contact places, and then again accept a normal form and outwardly look intact. However their bearing ability decreases.
Storage of tyres
Tyres should be stored in a cool, dark and dry place. They should not contact to oil and greasing.
To store tyres in lying position or put on a rim in garage or a cellar.
Before to dismantle wheels, slightly raise pressure of air in tyres (nearby 0,3–0,5 bar).
For winter tyres use their own ободья, since. Reinstallation of tyres on others ободья is connected with additional expenses.
New tyres have especially slippery surface. Therefore new tyres is concerns also a new spare wheel - follows обкатать. At such обкатке the surface of tyres becomes rough as a result of initial deterioration. The first 300 km it is necessary to go with new tyres especially cautiously, especially to crude weather.
Wheels – balancing
At each reinstallation of tyres of a wheel it is necessary again отбалансировать to compensate various distribution of weight and non-uniformity of a material.
In the course of driving the disbalance is shown by vibration and громыханием. The Steering wheel starts then to shiver small.
As a rule, steering wheel vibration is shown only in a certain range of speeds and disappears at switching on lower or high transfers.
The such phenomenon дисбалансировки can lead in due course to damage of axial joints, the mechanism of a steering and shock-absorbers. Necessarily balance wheels each 20 000 km and after each repair of tyres as in the course of deterioration and repair of tyres weight and material distribution changes.
Wrong deterioration of tyres
Non-uniform deterioration usually arises because of too low or too air high pressure in tyres, but can be caused also wrong installation of wheels or their disbalance, and also malfunction of the shock-absorber or a rim.
First of all pay attention to appropriate pressure of air in tyres, thus is not more rare than each four weeks supervise their condition.
To supervise pressure of air only on cold tyres. Pressure of tyres raises with their heating at fast driving. However it is not necessary to lower air from нагретых tyres.
At too high pressure of air in tyres the protector middle, since more wears out. Thus as a result of high internal pressure the tyre is more curved on the protector middle.
At too low pressure of air in tyres the protector wears out on tyre shoulders more, and the protector middle becomes convex inside. As a result takes place больший deterioration of shoulders of tyres.
Wrong installation of wheels and their disbalance give a typical picture of deterioration of tyres.