Summer tires

 - Optionally, tires with a maximum speed of

 - Optionally, tires with a maximum speed of over 149 mph (240 km/h) may have "ZR" in the size description depending on the manufacturer (e.g. 245/40 ZR 18).

The service specifications consist of load bearing index 5 and speed rating 6.

 - If the size description of your tire includes "ZR" and there are no service specifications, ask the tire manufacturer in order to find out the maximum speed.

If a service specification is available, the maximum speed is limited according to the speed rating in the service specification.

Example: 245/40 ZR 18 97 Y. In this example, "97 Y" is the service specification.

The letter "Y" represents the speed rating and the maximum speed of the tire is limited to 186 mph (300 km/h).

 - Every tire that has a maximum speed above 186 mph (300 km/h) must have "ZR" in the size description and the service specification must be given in brackets.

Example: 275/40 ZR 18 (99 Y). The speed rating "(Y)" shows that the maximum speed of the tire is above 186 mph (300 km/h).

Ask the tire manufacturer to find out the maximum speed.

    See also:

    Towing a trailer
    There are numerous legal requirements concerning the towing of a trailer, e.g. speed restrictions. Make sure that your vehicle/ trailer combination complies with the local requirements not only in ...

    Shifting to neutral N
    •► When the vehicle is stationary, depress the brake pedal. •► Push the DIRECT SELECT lever up or down to the first point of resistance. If the engine has been switched off, the au ...

    Well-proven seat technology with a new design
    Where seat development is concerned, Mercedes-Benz had added a new quality to a well established Mercedes concept, namely padded seat piping - a sophisticated and demanding upholstery technique th ...