Mercedes of the S-class W202
1993-2000 of release
Repair and operation of the car
+ 1.2. General information
+ 2. Maintenance
+ 3. Engines
+ 4. Lubrication system
+ 5. Cooling system
+ 6. Heating, ventilation
+ 7. System of ignition
+ 8. Fuel system
+ 9. Transmission
+ 10. Running gear
+ 11. Steering
- 12. Brake system
12.2. Anti-blocking system – ABS
12.3. The additional equipment – the ASR system
12.4. Specifications of the brake system
12.5. Overlays of front brake shoes
+ 12.6. Overlays of back disk brakes
12.8. Forward brake disk
12.9. Back brake disk
12:10. Brake fluid
12:11. Removal of air from the brake system
12:12. Brake pipelines / hoses
12:13. Replacement of brake highways
12:14. Brake shoes of the parking brake
12:15. Adjustment of the parking brake
12:16. Stoplight switch
12:17. Diagnostics of malfunctions of brakes
- 12:18. Wheels and tires
12.18.2. Service of wheels and tires
12.18.3. Diagnostics of malfunctions of tires
+ 13. Body
+ 14. Electric equipment
+ 14.2. Electrical circuitries
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Replacement of wheels
When replacing wheels it is inexpedient to change the direction of rotation of tires. For some tires the direction of rotation is specified by an arrow on lateral face and it should be observed surely.
To tighten wheel bolts only a dynamometer key. At the same time their identical inhaling is provided.
To replace tires not separately, and, at least, on one axis. At the same time with a bigger depth of a profile to mount tires behind.
Delete a possible rust on a surface of a prileganiye of a rim with a wire brush. For protection of a wheel against corrosion at each dismantle slightly grease with bearing lubricant the place of landing of a disk wheel on a nave in front and behind.
Use of chains of antisliding is allowed only on a back axis. Before installation of chains of antisliding to take off wheel caps. To use only the antisliding chains resolved by Mercedes.
For cars with the ASR traction control system the switch of chains of antisliding is used. At adjustment of height of the car to install the car on the highest clearance. To speed with antisliding chains no more than 50 km/h. On the highway, snow-covered and free from ice, to remove antisliding chains.
Care of tires
It is known that tires have so-called "memory", and their unqualified use, for example, bystry or frequent moving through stone borders or edges of rails, is quite often shown much later as their damage.
Cleaning of tires
Whenever possible do not clear the tire a vapor jet from the steam-ejecting pump. If it is too close to hold a nozzle of the steam-ejecting pump at the surface of the tire, then within several seconds there is a chaotic parabolic destruction of a rubber layer. The tire cleared thus for safety reasons has to be replaced.
Also tires which long time adjoined to oil or lubricant are subject to replacement. Tires bulk up at first on places of contact, and then again take a normal form and externally look intact. However their bearing ability decreases.
Storage of tires
Tires have to be stored in the cool, dark and dry place. They should not contact to oil and lubricant.
To store tires in lying situation or put on a rim in a garage or the cellar.
Before dismantling wheels, slightly increase air pressure in tires (about 0,3-0,5 bars).
For winter tires use their own ободья since rewiring of tires on other obodya is connected with additional expenses.
Running in of tires
New tires have especially slippery surface. Therefore new tires - it concerns also new spare wheel - it is necessary to roll. At such running in the surface of tires becomes rough as a result of initial wear. The first 300 km it is necessary to go with new tires especially carefully, especially to wet weather.
Wheels – balancing
At each rewiring of tires of a wheel it is necessary to balance again to compensate various distribution of weight and unevenness of material.
In the course of driving the imbalance is shown by vibration and rumble. The steering wheel begins then to shiver small.
As a rule, vibration of a steering wheel is shown only in the certain range of speeds and disappears when switching to lower or high transfers.
Such phenomenon of a disbalansirovka can lead to damage of axial joints, the mechanism of steering and shock-absorbers over time. Surely balance wheels each 20 000 km and after each repair of tires as in the course of wear and repair of tires distribution of weight and material changes.
Wrong wear of tires
Uneven wear usually arises because of too low or too high pressure of air in tires, but can be also caused by the wrong installation of wheels or their imbalance, and also malfunction of the shock-absorber or a rim.
First of all pay attention to the appropriate pressure of air in tires, at the same time at least each four weeks control their state.
To control air pressure only on cold tires. Pressure of tires increases with their heating at bystry driving. However it is not necessary to lower air from heated tires.
With too high pressure of air in tires the middle of a protector since at the same time as a result of high internal pressure the tire is more curved on the middle of a protector wears out more.
With too low pressure of air in tires the protector wears out on tire shoulders more, and the middle of a protector becomes convex inside. As a result bigger wear of shoulders of tires takes place.
The wrong installation of wheels and their imbalance give a typical picture of wear of tires.