11.18.1. Technical characteristics

The S-class Mercedes models, depending on the equipment, are equipped with tires and wheels of various sizes. The size, along with rim width, determines also press fitting depth. Depth of a press fitting represents the size from the middle of a rim to a wheel niche prileganiye surface to a brake disk.

All disk wheels have the pressed ledge which at very sharp driving on turns prevents the rim pressure upon the tubeless tire.

If tires and / or ободья which are not specified in the passport of the car are installed, it is necessary to bring them in the passport. For this purpose, as a rule, permission to their use from Mercedes is necessary.

All data on pressure of air are provided for cold tires. The increase in pressure resulting from long driving in tires on 0,2 bars should not be pitted.

Air pressure in the tire of a spare wheel corresponds to the maximum pressure at full loading.


As a result of continuous technical development by perhaps admissible there can be other values of pressure of air in tires and other combinations the tire rim for older models. Therefore we recommend to request urgent specifications in specialized repair shops.

Air pressure in tires is specified also in a sticker on a cover of the fuel tank.

Producers recommend to use tires only up to the depth of profile of 1,6 mm, on all surface of a protector depth of a profile has to be not less than 1,6 mm. However replacement of summer tires is for safety reasons recommended with a depth of profile of 2 mm and winter tires with a depth of profile of 4 mm.

As winter tires provide restriction of speed, the driver has to know the instructions concerning admissible highest speed.

Marking of disks

Example: 6 J x 15 H2 ET31:

6 = wheel rim width in inches
J = alphabetic reference of height and contour of onboard gas station of a rim
x = designation of a one-piece rim with the deep basis
15 = diameter of a rim in inches
H2 = an external and internal profile of a rim with a ledge shoulder
ET31 = depth of a press fitting is 31 mm.

Marking of tires


195 = tire width in mm
/70 = height relation to width (height of cross section of the tire makes 70% of width)
If the specified ratios of cross section are absent (for example, 155R13), then in this case the "normal" ratio height/width takes place. It makes 82% for radial tires.
N = class of speed, N: to 210 km/h (for new tires it is specified not always).
R = a radial design (= the radial tire) 14 = diameter of a rim in inches
89 = an index of the bearing ability.
N = alphabetic reference of admissible highest speed.

If between data 14 and 89 there is a designation N + S, then it indicates tires with a winter profile.

Alphabetic reference of speed

Alphabetic reference of speed costs after designation of the size of the tire. Symbols of designation of speed belong both to summer, and to winter tires.

160 km/h
180 km/h
190 km/h
210 km/h
240 km/h
270 km/h

Date of production of tires

Date of production is specified on the tire in a code of the manufacturer.

Example: DOT CUL2 of UM8 064 TUBELESS

DOT = U.S. Department of Transportation
CU = the reduced designation of the manufacturer of tires
12 = size shinyum8 = tire design
064 = date of production = the 06th week 1994
= symbol of the current decade (1990 - 1999)
TUBELESS = the tubeless tire (TUBETYPE = the tire with the camera).

The sizes of wheels and tires/pressure of air in tires
Model Size of tires
summer tires
Size of tires
winter tires of M+S
Disk wheel (rim) Pressure of tires in bar Half loading in front behind 2) with 4 passengers in front behind 2)
C250D C180 C200 185/65R1588H
195/65R1591H 3)
185/65 R15 88T
195/65 R15 91T
6Jx15 H2 ET31
6,5Jx15 H2ET37 1)
205/60R1591H 205/60 R15 91T 7Jx15 H2 ET42
7Jx15 H2ET37 1)
195/65R1591H 3)
185/65 R15 88T
195/65 R15 91T
6Jx15 H2 ET31
6,5Jx15 H2ET37 1)
205/60R1591H 205/60 R15 91H 7Jx15 H2 ET42
7Jx15 H2ET37 1)
195/65R1591V 195/65 R15 91T 6Jx15 H2 ET31
6,5Jx15 H2ET37 1)
205/60R1591V 205/60 R15 91H 7Jx15 H2 ET42
7Jx15 H2ET37 1)

1) Disks from light material
2) Cars with the sports chassis: + 0,2 bars
3) Tires of this size are mounted only on a rim of 61/2Jx15H2 ET37