Winter Tires - Mercedes-Benz SL Operator's Manual

Summe
r tires
Index Speed rating
Q up to 100 mph (160 km/h)
R up to 106 mph (170 km/h)
S up to 112 mph (180 km/h)
T up to 118 mph (190 km/h)
H up to 130 mph (210 km/h)
V up to 149 mph (240 km/h)
W up to 168 mph (270 km/h)
Y up to 186 mph (300 km/h)
ZR...Y up to 186 mph (300 km/h)
ZR...(..Y) over 186 mph (300 km/h)
ZR over 149 mph (240 km/h)
Optionally, tires with a maximum speed of
R
over 149 mph (240 km/h) may have "ZR"
in the size description, depending on the
manufacturer (e.g. 245/40 ZR18).
The service specification is made up of
load-bearing index A and speed rating
B.
If the size description of your tire includes
R
"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.
The maximum speed of the tire is limited to
186 mph (300 km/h).
The size description for all tires with
R
maximum speeds of over 186 mph
(300 km/h) must include "ZR" and the
service specification must be given in
2 or M+Si for winter tires.
All about wheels and tires
parentheses. Example:
275/40 ZR 18 (99 Y). The speed rating "(Y)"
indicates that the maximum speed of the
tire is over 186 mph (300 km/h). Ask the
tire manufacturer about the maximum
speed.
All-
weather
tires
and
winter
tires
Index Speed rating
up to 100 mph (160 km/h)
2
Q M+S
2 up to 118 mph (190 km/h)
T M+S
up to 130 mph (210 km/h)
2
H M+S
2 up to 149 mph (240 km/h)
V M+S
i Not all tires with the M+S marking provide
the driving characteristics of winter tires.
In addition to the M+S marking, winter tires
also have the i snowflake symbol on
the tire wall. Tires with this marking fulfill
the requirements of the Rubber
Manufacturers Association (RMA) and the
Rubber Association of Canada (RAC)
regarding the tire traction on snow. They
have been especially developed for driving
on snow.
An electronic speed limiter prevents your
vehicle from exceeding the following speeds:
130 mph (210 km/h):
R
all vehicles (except AMG vehicles)
-
155 mph (250 km/h):
R
SL 63 AMG
-
SL 65 AMG
-
186 mph (300 km/h):
R
SL 63 AMG (Performance Package)
-
SL 65 AMG with increased maximum
-
speed
543
Z