Mercedes-Benz E-Class Wagon Operator's Manual page 343

Index Index Speed r Speed rating ating
up to 186 mph (300 km/h)
1
ZR...Y
over 186 mph (300 km/h)
ZR...(..Y) 1
over 149 mph (240 km/h)
ZR 1
Specifying the speed rating as the "ZR" index
R
in tire code 4 is optional for tires up to
186 mph (300 km/h).
If your tire code 4 includes "ZR" and there is
R
no speed rating 7, nd out what the maxi-
mum speed is from the tire manufacturer.
If load-bearing index 6 and speed rating
R
are in brackets, the maximum speed rating of
your tire is above 186 mph (300 km/h). To
nd out the maximum speed, ask the tire man-
ufacturer.
1 "ZR" stated in the tire code.
2 Or "M+Si" for winter tires.
All-w All-weat eather tir her tires and wint es and winter tir er tires es
Index Index Speed r Speed rating ating
2 up to 100 mph (160 km/h)
Q M+S
2 up to 118 mph (190 km/h)
T M+S
2 up to 130 mph (210 km/h)
H M+S
2 up to 149 mph (240 km/h)
V M+S
Winter tires bear the i snow ake symbol and
ful ll the requirements of the Rubber Manufactur-
ers Association (RMA) and the Rubber Association
of Canada (RAC) regarding the tire traction on
7
snow.
Load inde Load index x 8 8 : :
No speci cation given: standard load (SL) tire
R
"XL" or "Extra Load": extra load tire or rein-
R
forced tire
"Light Load": light load tire
R
Wheels and tires 341
"C", "D", "E": a load range that depends on the
R
maximum load that the tire can carry at a cer-
tain pressure
De nition of t De nition of ter erms f ms for tir or tires and loading es and loading
T T ir ire s e str tructur ucture and c e and char haract acter eris istics: tics: describes the
number of layers or the number of rubber-coated
belts in the tire contact surface and the tire wall.
These are made of steel, nylon, polyester and
other materials.
Bar: metric unit for tire pressure. 14.5038 pounds Bar:
per square inch (psi) and 100 kilopascal (kPa) is
the equivalent of one bar.
DO DOT (Depar T (Department of Tr tment of Transport ansportation): ation): DOT-marked
tires ful ll the requirements of the
US Department of Transportation.
Av Aver erag age w e weight of t eight of the v he vehicle occupants: ehicle occupants: the
number of vehicle occupants for which the vehicle
is designed, multiplied by 150 lb (68 kg).
U U nif nifor orm T m Tir ire Quality Gr e Quality Grading St ading Standar andards:
standard to grade the quality of tires with regard
341
ds: a uniform