Checking tire inflation pressure
Tire inflation should only be checked when the tires are cold.
Tire inflation should be checked once a month, and also as part of maintenance.
In addition, tire inflation pressure should be checked before long motorway trips, as the temperature stress on the tires is the highest. At a continuous high speed, a tire with a low inflation pressure is subjected to greater lateral deformation during rolling and thus becomes very hot. As a result of this, a delamination of the profile may occur or the tire bursts. In addition, low inflation pressure increases fuel consumption.
Tire inflation pressures are indicated on a sticker on the inside of the fuel tank cap.
For motorway trips, we recommend increasing the tire inflation pressure by 0.2 bar.
Tire inflation pressure table from 9/93
Gasoline engines
Diesel engines
L - Limousine, V - Variant, V1 - Limousine with increased payload.
Chamber valve check
Unscrew the dust cap from the valve.
Wet the valve with soapy water or saliva. If an air bubble forms, screw the valve firmly with the dust cap upside down.
Attention: The valve can only be tightened with a metal cap. This cap is located on the side of the fuel tank.
Check the valve again. If air bubbles form again and the valve is no longer tightened, it must be replaced.
Be sure to reattach the dust cap.
Checking the tread pattern of a tire
Tires of balanced wheels, if the prescribed tire pressure is conscientiously observed, with the correct installation of the wheels and the operation of the shock absorber, wear out over the entire working surface approximately evenly. Otherwise, it is generally impossible to draw a conclusion about the resource of tires of a certain fabrication, since this resource depends on various factors:
- pavement quality
- tire inflation pressure
- driving style
- weather
First of all, rapid tire wear is promoted by a sporty driving style, quick starting and hard braking.
Attention: In fairness, it should be said that the height of the tread pattern during wear can decrease by up to 1.6 mm, namely, the depth of the grooves of the tread pattern over the entire working surface must still be at least 1.6 mm. However, for safety reasons, it is recommended to replace tires with a tread depth of at least 3 mm.
If the tread height approaches the minimum allowable value, and the prescribed wear value of 1.6 mm is exceeded in many places along the perimeter of the tires and the pattern is no longer there, this means that such tires must be replaced.
Attention: Tires with a winter tread pattern marked M+S have sufficient grip on mud and snow only if the tread depth is at least 4 mm.
Caution: Check tires for cuts. If cuts are found, determine their depth with a small screwdriver. If the depth of the cut reaches the carcass, then the steel cord of the tire correlates due to water penetration. Under such circumstances, the working surface lags behind the carcass, the tire begins to crack. Therefore, in case of deep cuts in the tire tread, for safety reasons, replace it.
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