2018 MERCEDES-BENZ S CLASS Owners Manual

Ste p 1
Example 1E xa mp le 2
Combined maximum we ight of occupants and
load (data from th e Ti re and Loading In fo rm ation
placard) 15 00 lbs (680 kg )1 500 lbs (680 kg )
Ste p 2
Example 1E xa mp le 2
Numb er of people in th e ve hicle (driver and
occupants) 51
Distribution of th e occupant sF ro nt: 2
Re ar: 3 Fr ont: 1
We ight of occupant sO ccupant 1: 15 0 lbs (68 kg )
Occupant 2: 18 0 lbs (82 kg )
Occupant 3: 16 0 lbs (73 kg )
Occupant 4: 14 0 lbs (63 kg )
Occupant 5: 12 0 lbs (54 kg ) Occupant 1: 200 lbs (91 kg )
To ta l we ight of all occupant s7 50 lbs (340 kg )2 00 lbs (91 kg ) Wheels and tires 423

Ste p 3
Example 1E xa mp le 2
Pe rm issible load (maximum gros s ve hicle we ight
ra ting from th e Ti re and Loading In fo rm ation
placard minus th e gross we ight of all occupants) 15 00 lbs (680 kg )

Ti re labeling
Overview of tire labeling
1
Uni fo rm Ti re Quality Grading St andard
( →
page 425)
2
DO T, Ti re Identification Nu mber
( →
page 426)
3
Maximum tire load ( →
page 427)
4
Maximum tire pressu re ( →
page 428) 5
Manufacturer 6
Characteristics of th e tire ( →
page 428)7
Ti re size designation, load-bea ri ng capacity,
speed ra ting and load ind ex ( →
page 428)8
Ti re name

and one-half times as we ll on th e go ve rn ment
te st track as a tire graded 10 0.
The re lative per fo rm ance of tires depends upon
th e actual conditions of th eir use, ho we ve r, and
may depart significantly from th e norm due to
va ri ations in driving habits, service practices and
dif fe re nces in ro ad ch aracteristics and climate
conditions.
Tr action gr ade
q
DA NG ER Risk of accident due to inade‐
qu ate traction
The traction gr ade assigned to th is tire is
based on st ra ight-ahead braking traction
te st s, and does not include either accelera‐
tion, cornering, hy droplaning or peak traction
ch aracteristics.

Ne ve r exc eed maximum tire pressure 1 speci‐
fi ed fo r th e tire.
Information on tire ch aracteristics

Preceding letter 1 :R
Wi th out: passenger ve hicle tires according to
European manufactu ri ng st andards.R
"P": passenger ve hicle tires according to US
manufacturing st andards.R
"LT": light truck tires according to US manu‐
fa cturing st andards.R
"T": compact emer ge ncy spa re wheels with
high tire pressure th at are on ly designe d fo r
te mp orary use in an emer ge ncy.
Aspect ra tio 3 :
Ra tio between tire height and tire width in per‐
cent (ti re height divided by tire width).
Tire code 4 (ti re type):R
"R" ra dial tireR
"D": bias ply tire R
"B": bias belted tires R
"ZR": ra dial tire with a maximum speed abo ve
14 9 mp h (240 km/h) (optional) Rim diame te r 5 :
The diam et er of th e bead seat (not th e diame te r
of th e ri m fl ange). The ri m diame te r is specified
in inches (in).
Load-bearing index 6 :
Numerical code th at specifies th e maximum
load-bearing capacity of a tire (e.g. "91" cor re ‐
sponds to 13 56 lbs (6 15 kg )).
The load-bearing capacity of th e tire must be at
least half th e permissible axle load of yo ur ve hi‐
cle. Do not ove rl oad th e tires by exc eeding th e
specified load limit.
See also: R
Maximum permissible load on th e Ti re and
Loading In fo rm ation placard ( →
page 420)R
Maximum tire load ( →
page 427)R
Load ind ex
Speed ra ting 7 :
Specifies th e appr ove d maximum speed of th e
tire.

Inde xS peed ra ting
ZR...Y 1
up to 18 6 mp h (3 00 km/h)
ZR...(..Y) 1
ove r 18 6 mp h (3 00 km/h)
ZR 1
ove r 14 9 mp h (240 km/h)R
Specifying th e speed ra ting as th e "ZR" index
in tire code 4 is optional fo r tires up to
18 6 mp h (3 00 km/h).R
If yo ur tire co de 4 includes "ZR" and th ere
is no speed ra ting 7 , fi nd out what th e max‐
imum speed is from th e tire manufacturer.R
If load-bearing index 6 and speed ra ting 7
are in brac ke ts, th e maximum speed ra ting of
yo ur tire is abo ve 18 6 mp h (300 km/h). To
fi nd out th e maximum speed, ask th e tire
manufacturer. All-weather tires and winter tires
Inde xS peed ra ting
Q M+S 2
up to 10 0 mp h (160 km/h)
T M+S 2
up to 11 8 mp h (1 90 km/h)
H M+S 2
up to 13 0 mp h (2 10 km/h)
V M+S 2
up to 14 9 mp h (240 km/h)
Wi nter tires bear th e M snowflake symbol
and fulfill th e requ irements of th e Ru bber Manu‐
fa cturers Association (RMA) and th e Ru bber
Association of Canada (RAC) re ga rd ing th e tire
traction on sno w.
Load index 8 : R
No specification given: st andard load (SL)
tire R
"XL" or "Extra Load": ex tra load tire or re in‐
fo rc ed tire R
"Light Load": light load tire R
"C", "D", "E": a load ra nge th at depends on
th e maximum load th at th e tire can car ry at a
cer ta in pressure
Definition of term s fo r tires and loading
Ti re stru ctu re and ch aracteristics: describes
th e number of la ye rs or th e number of ru bber-
coated belts in th e tire con ta ct su rf ace and th e
tire wa ll. These are made of st eel, ny lon, poly‐
es te r and ot her materials.
Bar: metric unit fo r tire pressu re .
14 .5038 pounds per square inch (psi) and
10 0 kilopascal (kPa) is th e equivalent of one bar.
DOT (Department of Tr anspo rt ation): DO T-
mar ke d tires fulfill th e requ irements of th e
US Department of Tr anspor ta tio n.
Av erage we ight of th e ve hicle occupants: th e
number of ve hicle occupants fo r whi ch th e ve hi‐
cle is designed, multiplied by 15 0 lb (68 kg ).
1
"ZR" st ated in th e tire code.2
Or "M+S M " fo r winter tires430
Wheels and tires