Mercedes-Benz 2009 SL-Class Operator's Manual page 228

Operation
Tires and wheels
in the size designation AND the service
description must be placed in parenthesis.
Example: 275/40 ZR 18 (99Y). The "(Y)"
speed rating in parenthesis designates the
maximum speed capability of the tire as
being above 186 mph (300 km/h). Consult
the tire manufacturer for the actual maxi-
mum permissible speed of the tire.
All-season and winter tires
Index Speed rating
9 up to 100 mph (160 km/h)
Q M+S
9 up to 118 mph (190 km/h)
T M+S
up to 130 mph (210 km/h)
9
H M+S
9 up to 149 mph (240 km/h)
V M+S
i Not all M+S rated tires provide special
winter performance. Make sure the tires
you use show M+S and the mountain/
snowflake.marking on the tire side-
wall. These tires meet specific snow trac-
tion performance requirements of the
Rubber Manufacturers Association (RMA)
and the Rubber Association of Canada
9 or M+S.for winter tires
226
(RAC) and have been designed specifically
for use in snow conditions.
An electronic speed limiter prevents your
vehicle from exceeding a speed of:
155 mph (250 km/h):
R
SL 550
-
SL 550 (Sport Package)
-
SL 600
-
SL 600 (Sport Package)
-
SL 63 AMG
-
SL 65 AMG
-
186 mph (300 km/h):
R
SL 63 AMG (Performance Package)
-
SL 65 AMG with increased top speed
-
The factory equipped tires on your vehicle
may have a tire speed rating above the max-
imum speed permitted by the electronic
speed limiter.
Make sure your tires have the required tire
speed rating as specified for your vehicle in
the "Technical data" section (
for example when purchasing new tires.
If you are uncertain about the correct reading
of the information given on a tire's sidewall,
any authorized Mercedes-Benz Center will be
glad to assist you.
Load identification
Load identification
1
i For illustration purposes only. Actual data
on tires are specific to each vehicle and
may vary from data shown in above illus-
tration.
In addition to tire load rating, special load
identification
sidewall following the letter designating the
Y page 343),
tire speed rating
may be molded into the tire
1
( Y page 224).
6