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Checking the status of the tire and the pressure therein. A designation of tires and disks of wheels. Rotation and replacement of wheels
Depending on the model and equipment can be installed tires and wheels of different sizes. Discs have a depth of 38 mm pressing. Joining depth - the distance from the center of the disc to the hard surface of the wheel on the brake disc or drum.
Wheel bolts for steel and alloy wheels are the same size.
 | Installation alloy wheels other manufacturers may require other dimensions of the bolts.
Technology is improving. It may be that for older models other values are permitted tire pressure. Determines the dimensions specified in the documents of the car.
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At a sports manner of driving it is recommended to increase the pressure in the front and rear tires to 0.2 bar. With increasing pressure should be based on the basic values for the various loading conditions.
Snow tires tend to have a pressure of 0.2 atm. higher than summer. It should take into account the recommendations of manufacturers of winter tires.
Since winter tires have restriction on speed, in the field of vision must be reinforced plate specifying the maximum speed.
Legend drives
EXAMPLE 6 J x 15
6 disc width in inches
J lettering height and contour disk rim flange
x designation of whole deep drive
Disk diameter 15 inches
Permissible lateral runout on the outboard rim disk: 0.8 mm;
Permissible radial runout on the landing shelf disk: 0.5 mm.
Designation of tires
Example: 195/70 R 14 89 H
195 width of the tire in millimeters
/ 70 aspect ratio (height of the cross section of the tire is 70% of the width)
If hospitality information about the relationship of width to height are absent (for example, 175 R 14), then it is a "normal" relations. It is 82%.
H speed class H: up to 210 km / h (on new tires is not always).
R radial design
14 disk size in inches
89-duty option
| If the data between 14 and 89 is designation M + S, it comes with a winter tire tread. |
H designation permissible maximum speed.
The letter rate is the size of the tire. Symbols of speed concern as to the summer and snow tires.
Letter designations speed given in the specification.
Date of manufacture tires
The date of manufacture is the tire on the tire manufacturer's code
Example:
DOT CUL2 UM8 019 TUBELESS
DOT Department of Transportation (US Department of Transportation)
CU abbreviation manufacturer
L2 tire size
UM8 performance of tires
4600 production date - the 46th working week of 2000
TUBELESS Tubeless (TUBETYPE - bus with the camera) Regular inspection of the tires allow you to avoid the troubles connected with stops along the way because of a flat tire. In addition, such tests provide valuable information about possible problems with steering and suspension until them serious damage.
 | Tires have built-tread wear indicator bars, which are exposed at lower tread depth to 1.6 mm, after which the tire is worn out. This value represents the minimum allowable tread depth; in most cases it is recommended to replace the tire tread depth is 2 mm or less. Tread depth can also be determined by a simple and inexpensive device, known as a tread depth gauge. |
Pay attention to any unusual deterioration of protectors. Such defects protector as cavities, convexity flattening and stronger deterioration on the one hand indicate the violation of the angles of the front wheels and / or wheel balancing. At revealing any of the following defects should refer to their adjustment in tire shops.
Carefully check the tire for cuts, punctures and got stuck nails or buttons. Sometimes after puncturing tires nail it still some time holds pressure or lowers very slowly.
If you suspect the presence of such "slow puncture", first check the tightness of the pump nipple valve. Then inspect the tread for jammed foreign objects or renovated before puncture again to pass air. If you suspect that there is a puncture, to make sure his presence is possible, moistened suspected site with soap and water. If you have a leak solution begins to bubble. If the puncture is not too big bus can usually be repaired in any tire shop.
Carefully examine internal lateral surfaces of tires on presence on them of signs of leak of brake fluid. If any, immediately check the brake system.
Maintaining proper tire pressure increases their service life, saves fuel and improves the overall ride comfort. To check the pressure you need a special gauge.
Recommendation: Always keep an accurate gauge in your glove compartment. Gauges built into the nozzle air hoses at service stations are often inaccurate.
Always check the pressure on cold tires (ie, before traveling by car). If you check the pressure in the tires warm or heated, it will lead to an overestimation of the pressure gauge because of the thermal expansion of tires. In this case it should never be lower pressure, as After cooling, the tire it will be below normal.
Unscrew the cap from the valve of the pump, the speaker of the drive wheel or hub cap, and then firmly press the gauge to the valve nozzle. Consider instrument readings and compare them with recommended in Specifications. Do not forget to replace the cap to prevent entry into the mechanism of the pin dirt and moisture. Check the pressure in all four tires and if necessary pump up them to the recommended pressures.
Do not forget to maintain the required pressure in the spare wheel.
Checking tire pressure
Check the air pressure should be performed only on cold tires. |  | 1. Remove the valve cap. |
2. Tyre pressure checked once a month, as well as during maintenance (including spare wheel).
3. In addition, the air pressure should be checked before each long trip since in this case, increases thermal load on the tires.
4. The required air pressure in the tires is shown on a label located on the inside of the fuel tank cap. | When using winter tire air pressure must be increased by 0.2 bar. with respect to the set value. |
5. The air pressure narrow tire spare wheel is indicated on the sidewall of the disc.
The tire pressure varies with changes in ambient air at 10 ?� C for about 0.1 atm. This should be taken into account in the control of air pressure in the tires in the garage - especially in winter. Example:
Temperature
in the garage is about + 20 ?� C
Temperaturanaruzhnogo air around 0 ?� C
Davlenievozduha installed tire air pressure above = + 0.2 atm. The values of tire pressure given for a small load of the car, are minimum values, provides comfortable movement.
The increased air pressure in the tires provided for the vehicle at a high load, a positive effect on the car's handling also at low load is quite acceptable. Smooth rolling at the same time, however, it is somewhat reduced. |
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Tire Valve
 | 1 and 2 - rubber and metal caps
3 - valve | 4 - valve body |
Checking tire valve
| | Applied extenders valves must be checked for damage and contamination, leading to leakage. If necessary extenders should be replaced. |
1. Remove the protective cap and an extension cord.
2. Apply a small amount of valve soap solution or saliva. If an air bubble is formed, pull gate 3 protective cap 2. | To pull the valve should be used only cap 2. 1 rubber protective cap, 4 valve. |
3. Recheck valve. If bubbles appear and the valve can not tighten, replace (work HUNDRED).
4. Be sure to re-install the protective cap. |
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Examples of typical wear of tire treads
Side wear
Insufficient pressure in the tire causes its overheating due to excessive movement during deflection, whereby the tread is not sufficiently pressed against the surface of the road. This leads to a loss of grip and excessive wear of the tread, not to mention the danger of leaving tire failure due to overheating.
Check and adjust the pressure.
Wrong disorder of wheels (deterioration on the one hand)
Repair or replace suspension parts.
Too sharp turns
Slow down!
Central wear Overpressure
Excessive tire pressure leads to accelerated wear of the central part of the tread, reduced grip, tighter traffic and increase the danger of fatal damage of a slope.
Check and adjust the pressure.
If you have to pump up the tires for the transport of heavy loads up to the specified for this purpose in Specifications pressures, do not forget after that to pit it at transition in normal operation.
Uneven wear Front tire may wear unevenly as a result of violations of wheel alignment.
Wrong collapse or Coast
Repair or replace suspension parts.
Defect suspension
Repair or replace suspension parts.
Unbalanced wheel
Make balancing of wheels.
Improperly installed convergence of front wheels
Align the front wheels. | Obtrepannost edges of the tread pattern is a sign of wear and tear, it is best detected by touch. |
The rotation of the wheels
The rotation of the wheels is permitted only with the same size front and rear wheels.
Rotation of the wheels is made depending on tire wear every 5,000-10,000 kilometers. While maintaining the direction of rotation of the wheels.
Rotation should be performed before the characteristic signs of tire wear. A characteristic feature of the wear the tires of the front wheels is deterioration of the shoulder area of the tread, the tires and the rear wheels - the middle of the tread.
Each rotation of the wheels must be carefully cleaned them from the inside. After the rotation of the wheels, check and if necessary correct the tire pressures (see. Above).
Wheel bolts may become loose if they are not tightened to the specified torque in the Specifications. After changing wheels, check torque.
Use only genuine bolts ?�MB?�, indicated the star ?�Mercedes-Benz?�. Other screws may loosen.
The spare wheel is lightweight
When tire damage spare tire lightweight design can be used as a normal wheel; It recommended, however, as soon as possible to replace it with a normal wheel as it is designed to maximize a limited run of 20 000 km.
When replacing the tires, the tire of a spare wheel can be mounted on the impeller, if the tire meets performance tires impellers. If the tire is older than 6 years old, it is recommended only when a flat tire.
Models with tires 245 / 45R18:
If the spare tire is mounted lightweight, due to the different sizes of tires should be considered to change the dynamic properties of the car. Realizing driving style to the road situation.
As soon as possible, replace the spare tire lightweight conventional wheel.
Models with a joint company AMG
There is a risk of an accident!
If the spare tire is mounted lightweight, due to the different sizes of tires should be considered to change the dynamic properties of the car. Realizing driving style to the situation.
It is, therefore, provided only short-term use at the prescribed air pressure in the tires and the maximum speed of 80 km / h.
Operation with more than one spare wheel lightweight construction is not allowed.
Replacement wheels
One of the wheel bolts  | | 1 - Used to drive legkoslpavnyh | 2 - It is used for steel wheels |
Car jack is only intended for short-term lift the vehicle when changing a wheel.
Support the jack pad must be firm and level. In the case of loose soil use lining to the jack.
For work under the vehicle must be used bogus goats. | 1. Put the car, if possible, on a flat area. Press down the parking brake pedal. It is impossible to release the parking brake while the vehicle is raised.
2. AT selector lever translate in position "P". Secure the vehicle against inadvertent rolling by placing chocks, etc.
3. On a flat road, Put emphasis under the wheel diagonally opposite the front and rear.
4. On the ascents and descents: enclose an emphasis under both wheels of another bridge in the downward direction on the descent.
5. From the vehicle tool kit to remove the key wheels.
6. Loosen the wheel bolts the key, but do not unscrew them completely.  | 7. The jack is fully slide into the hole to install the jack. Car jack must always stand upright - also on slopes. |
8. Lift the car until the wheels are on the ground.
9. In order to prevent the vehicle from sliding bearing pin jack fully (all the way) into the hole for a car jacking.  | 10. Remove the upper bolt. Centering pin -1- from the vehicle tool kit into the threaded screw hole. The rest of the bolts for attaching the wheels turn out. Do not put the wheel bolts on the sand or mud. |
11. Remove the wheel. |
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Bolts of wheels | 1. Replace the wheel bolts with damage or rust.
2. Do not lubricate the bolts with oil or grease.
In case of damage to the threads in the wheel hub can not keep going. It is necessary to address on HUNDRED ?�Mercedes-Benz?�.
3. Clean the contact surfaces of the wheel and hub.
Use only genuine bolts ?�MB?�, indicated tr?�hkonechnoy star ?�Mercedes-Benz?�. Other screws may turn away.  | 4. Push and press the wheel. |
5. Screw in wheel bolts and tighten slightly.
6. Remove the dowel pin and screw the last bolt wheels.  | 7. Lower the car. Remove the car jack. |
 | 8. Tighten all the wheel bolts. Driving tightening is shown in the illustration. The torque specified in the specification. |
There is a risk of an accident!
Wheel bolts may become loose if they are not tightened to the specified torque. Therefore, always check the torque immediately after changing wheels.  | ?� Before laying the jack in the storage compartment under the boot floor, turn the bearing pin jack back almost to the support.
?� Dismantle the detachable key for the wheel and place it in the vehicle tool kit.
??? Check and, if necessary, adjust the air pressure in the tires. |
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Check the expiry date of the sealant ?�TIREFIT?� Tyre
Depending on the vehicle equipment, instead of the spare wheel may have a bottle of sealant for tires ?�TIREFIT?�.
| 1. Open the tailgate and the bottom of the trunk.  | 2. Remove the bottle TIREFIT (1) and check the expiry date on the label (2). Suitability retained for 3 years from the date of manufacture. At the expiry of this period, replace the sealant. The date of manufacture and expiry date marked on the label TIREFIT.
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3. If necessary, when purchasing a new sealant can be put into an old recycling.
4. Close the bottom of the trunk lid and tailgate. |
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