AH40.10-P-9411-01A Information on Tires/Rims

AH40.10-P-9411-01A Information on tires/rims

Tires
^ For service conversions, the tire/disk wheel specifications and dimensions should be compared with the entries in the registration papers.
^ Damaged and defective tires must always be replaced. The repair methods employed in the tire trade are not approved by Mercedes-Benz. Small nicks (< 0.8 mm) on the side wall of the tire do not usually pose a cause for concern, and continued use of such tires is approved.
^ Only use tires listed in the valid Service Information bulletins and repair instructions.
^ Replace tire valve, general.
^ When mounting tires, the tires and rims must be carefully matched in order to guarantee the concentricity of the wheel.

Identification of matching points:
- on tires by means of a colored dot on the outboard side of the tire
- on a steel rim, by color dot or punch mark on the outboard side of wheel
- on light alloy wheel, in general on the valve hole.

Model 140: in addition color dot or countersink in rim base.

^ If a single tire is replaced, always mount the new tire on the front axle. This does not apply to vehicles with different tires of varying specifications on the front and rear wheels.
^ Always provide all disk wheels with tires of the same construction, same make and same design.
^ If the maximum permissible speed of an M+S tire is lower than the maximum speed of the vehicle, an appropriate warning sticker must be affixed within the driver's field of view.
^ Tires approved for higher speeds may be used.
^ Run in new tires for approx. 100 km at moderate speed.
^ Handed tires must be installed according to the arrow on the side wall of the tire.
^ Tires are subject to an aging process with negative effects on the properties of the tire. In order to ensure optimum effectiveness in winter, M&S tires should not be used for longer than 3 years.

Tire pressure
(For specified values, see the tire pressure chart inside the fuel filler flap; on Vaneo model 414, see the B-pillar in the passenger side) Too low tire pressure increases the rolling resistance and increases the flexing energy of the tire. This causes the critical temperature limit to be exceeded (carcass detachment) and destroys the tire. In the event of a pressure loss establish cause and if necessary establish cause and if necessary replace tire, tire valve or disk wheel.

Cleaning
The use of high-pressure spray wands projecting a concentrated round-pattern stream to clean the wheels can lead to tire damage. Such damage occurs especially on the tire side walls. When using flat jet nozzles, observe the following instructions:
^ Maintain a distance of at least 300 mm
^ Do not direct the water jet at a single point on the surface of the tire for any length of time

Bearing system
Before putting into storage, clean tires thoroughly and check for damage and adequate tread depth. Mark the position and running direction of the tires with chalk. Do not store tires outdoors. The effects of sunlight, heat, moving air and ozone cause the rubber to lose its elasticity and strength, it ages faster and cracks. Storage areas should be dry, cool and dark. Avoid drafts by keeping doors and windows closed as much as possible. Do not bring tire into contact with gasoline, oil or greases as these dissolve rubber.

Disposal
Collection, storage and disposal should be performed in accordance with the legal requirements and the company's own regulations.

Rims
For safety reasons, damaged or deformed rims must not be repaired.
^ When changing wheels, e.g. light alloy wheels for steel rims, ensure that the wheel bolts required for the spare wheel are enclosed in a clearly visible position.
^ Since December 1994 all models 124 and 202 receive a spare wheel with a steel rim. Vehicles with light alloy rims fitted at the plant have corresponding wheel bolts enclosed.
^ Strengthened steel rims are identified by a sticker on the wheel disk.
^ On steel rims and light alloy disk wheels in general the wheel bolts should be tightened to the specified torque using a torque wrench.

Retightening of the wheel bolts after approx. 100 to 500 km is not required.

The seat for the tire bead must display no corrosion pits.
^ Only use disk wheels of the same design approved by Mercedes-Benz.
^ Before inserting a new tire valve clean the contact surfaces on the disk wheel.

To support the tire valve wheel covers must be fitted to steel rims.

Vehicles with tire pressure monitor
^ Before replacing a tire, check the manufacture date of the wheel sensor. Wheel sensors, which are older than 5 or 7 years, must be replaced.
^ Use STAR DIAGNOSIS to read out the actual values for the tire pressure monitoring system. Check the remaining life of the wheel sensor battery, replace the wheel sensor if necessary.