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Maintenance of wheels and tires

Changing wheels

When replacing wheels is inappropriate to change the direction of rotation of tires. Some tire rotation direction indicated by the arrow on the side and must be adhered to.

It recommended every 10 000 km to replace the rear wheel drive. Due to this, all four wheels will have the same life and the same wear.

Tighten the wheel bolts only a torque wrench. This provides the same tightening them.

Replace tires not separately, but at least one axis. At the same bus with greater depth profile mounted at the rear.

When replacing or removing tubeless tires for safety reasons, be sure to replace the rubber valve.

PERFORMANCE ORDER

1. Press the wheel cover with a screwdriver and remove the hands, depending on the design. 2. Before removing the label the chalk or felt-tip position of the wheel relative to the hub so that when remounting set the wheel in his same position. 3. The rims of light metal protected from corrosion by a transparent lacquer. When replacing wheels, try not to damage it, if necessary, improve coverage. A warning Bolts 1 (length L = 40 mm, K = 13, 5 mm) are intended only for the disc wheels of light metal bolts 2 (length L = 21 mm, K = 10, 5 mm) are used only for steel disc wheels. If further mounted rims of light metal, and as a spare wheel is supplied steel disc wheels are recommended in the toolbox have the appropriate screws to the spare wheel. 4. Clean contaminated thread a wire brush. Do not lubricate bolts oil and grease. 5. Before installing the disk wheels of light metal screw into the upper threaded hole mounting sleeve, which is attached to the spare wheel. 6. Secure the wheel bolts crosswise in several passes. A warning When unilaterally or under strong tightening bolts may be too tight, or the wheel hub. 7. Torque: 110 Nm rims for steel and light metals. 8. Refit the wheel cap. When you put the cap assembly so that the valve strongly entered the recess provided for it. Steel rims should only be used with mounted wheel cover to avoid damaging the tire valves. 9. When the new wheels, tighten the wheel bolts after about 100 - 500 kilometers with 110 Nm torque

Anti-skid chains

Use of snow chains is permitted only on the rear axle. Before installing snow chains to remove the wheel caps. Only use chains that are allowed by Mercedes.

For vehicles with ASR traction control switch is used with snow chains. When adjusting the vehicle height to set the car on the highest ground clearance. Go with snow chains at a speed not exceeding 50 km / h. On snow and ice-free highway to take snow chains.

Caring for tires

It is known that tires have a so-called "memory", and the unqualified use them, for example, fast or frequent travel through the stone curbs or edges of the rails, often manifests itself well after their injury.

Clean buses

If possible, do not clean the tires jet vapor from the diffusion pump. If the nozzle is too close to the diffusion pump to keep the surface of the tire, within a few seconds the parabolic random destruction of the rubber layer. Purified tire thus for safety reasons has to be replaced.

Replacement tires are also subject to a long time in contact with oil or grease. Tires swell at first on the points of contact, and then take the normal shape and look undamaged. However, their carrying capacity is reduced.

Storage of tires

Tires should be stored in a cool, dark and dry place. They should not be in contact with oil and grease.

Keep tires in a supine position or to wear to the rim in the garage or basement.

Before dismantle the wheel, slightly Increase tire pressure (about 0.3-0.5 bar).

For winter tires, use their own rims, t. To. Remounting tires on rims others associated with additional costs.

Running tires

New tires have a particularly slippery surface. Therefore, new tires - this also applies to the new spare wheel - must break in. In this run-tire surface becomes rough due to the initial wear. The first 300 km should go with the new tires with particular caution, especially in wet weather.

Wheel - balancing

Each rewiring tire must again balance the wheel to compensate for different weight distribution and uneven material.

During the drive imbalance manifests vibration and rumbling. The steering wheel starts to tremble and then finely.

Typically, the vibration of the steering wheel is shown only in a certain speed range and disappears when switching to lower or higher transmission.

This kind of phenomenon disbalansirovki over time can damage the axle joints, the steering and shock absorbers. Required balancing wheels 20 every 000 km and after each tire repair, because the process of deterioration and repair of tires is changed and the distribution of mass of the material.

Wrong tire wear

On the front wheels slightly larger shoulder tire wear compared to the middle of the tread - a normal phenomenon. Moreover, as a result of inclination of the road tire wear shoulder directed towards the middle of the road is significantly clearer (left wheel: outside right wheel: the inside).

Uneven wear usually occurs because of too low or too high air pressure in the tires, but it can also be caused by improper installation of wheels or imbalance, as well as a shock absorber or a malfunction of the rim.

Sawtooth profile tire wear is usually caused by overloading the vehicle.

First of all, pay attention to proper tire pressure, while at least every four weeks, monitor their condition.

To control the air pressure only on cold tires. Tire pressure rises with their heating when driving fast. But we should not lower the air from hot tires.

At too high air pressure in the tires wear out over the middle of the tread, ie. K. In the resulting high internal pressure greater tire tread is curved in the middle.

At too low pressures the tire tread wear on the shoulders of larger tires, while the middle of the tread becomes convex inwardly. As a result, there is greater wear on the shoulders of the tires.

Incorrect installation of the wheels and their imbalance gives a typical picture of tire wear.