2019 MERCEDES-BENZ S-CLASS CABRIOLET light

Preceding letter
1
1:
R Without: passenger vehicle tires according to
European manufactu ring standards.
R "P": passenger vehicle tires according toUS
manufacturing standards.
R "LT": light truck tires according toUS manu‐
fa cturing standards.
R "T": compact emer gency spa rewheels with
high tire pressure that are on ly designed for
te mp orary use in an emer gency.
Aspect ratio 3
3:
Ra tio between tire height and tire width in per‐
cent (ti reheight divided bytire width).
Tire code 4
4(tire type):
R "R" radial tire
R "D": bias ply tire
R "B": bias belted tires
R "ZR": radial tire with a maximum speed abo ve
14 9mp h (240 km/h) (optional) Rim diame
ter5
5:
The diam eter of the bead seat (not the diame ter
of therim flange). The rim diame ter is specified
in inches (in).
Load-bearing index 6 6:
Numerical code that specifies the maximum
load-bearing capacity of a tire (e.g. "91" cor re‐
sponds to1356 lbs (6 15kg)).
The load-bearing capacity of the tire must be at
least half the permissible axle load of your vehi‐
cle. Do not overload the tires byexc eeding the
specified load limit.
See also:
R Maximum permissible load on theTire and
Loading In form ation placard (→ page 384)
R Maximum tire load (→ page 390)
R Load ind ex
Speed rating 7 7:
Specifies the appr oved maximum speed of the
tire. %
An electronic speed limi ter pr events your
ve hicle from exceeding a speed of 130mph
(2 10 km/h).
Ma kesure that your tires ha vetherequ ired
speed rating. You can obtain information on the
re qu ired speed rating from an au thorized
Mercedes-Benz Center.
Summer tires Inde
xS peedrating
Qu pto 100mp h (160 km/h)
Ru pto 106mp h (170 km/h)
Su pto 112mp h (1 80 km/h)
Tu pto 118mp h (190 km/h)
Hu pto 130mp h (2 10km/h)
Vu pto 149mp h (2 40 km/h)
Wu pto 168mp h (270 km/h)
Yu pto 186mp h (3 00 km/h) 392
Wheels and tires

Inde
xS peedrating
ZR...Y 1
upto186mp h (3 00 km/h)
ZR...(..Y) 1
over18 6mp h (3 00 km/h)
ZR 1
over14 9mp h (240 km/h) R
Specifying the speed rating as the "ZR" index
in tire code 4is optional for tires up to
18 6mp h (3 00 km/h).
R Ifyo ur tire code 4includes "ZR" and there
is no speed rating 7,find out what the max‐
imum speed is from the tire manufacturer.
R If load-bearing index 6and speed rating 7
are in brac kets, the maximum speed rating of
yo ur tire is abo ve186mp h (300 km/h). To
fi nd out the maximum speed, ask the tire
manufacturer. All-weather tires and winter tires Inde
xS peedrating
Q M+S 2
upto100mp h (160 km/h)
T M+S 2
upto118mp h (1 90 km/h)
H M+S 2
upto130mp h (2 10km/h)
V M+S 2
upto149mp h (240 km/h) Wi
nter tires bear the004D snowflake symbol
and fulfill therequ irements of theRu bber Manu‐
fa cturers Association (RMA) and theRu bber
Association of Canada (RAC) rega rding the tire
traction on sno w.
Load index 8
8:
R No specification given: standard load (SL)
tire
R "XL" or "Extra Load": extra load tire or rein‐
fo rc ed tire
R "Light Load": light load tire R
"C", "D", "E": a load range that depends on
th e maximum load that the tire can car ryat a
cer tain pressure Definition of
termsfo r tires and loading
Ti re stru ctureand characteristics: describes
th e number of la yers or the number of rubber-
coated belts in the tire conta ct surface and the
tire wall. These are made of steel, nylon, poly‐
es ter and other materials.
Bar: metric unit for tire pressu re.
14 .5038 pounds per square inch (psi) and
10 0 kilopascal (kPa) is the equivalent of one bar.
DOT (Department of Transpo rtation): DOT-
mar ked tires fulfill therequ irements of the
US Department of Transpor tatio n.
Av erage weight of theve hicle occupants: the
number of vehicle occupants for which th eve hi‐
cle is designed, multiplied by150 lb (68 kg).
1 "ZR" stated in the tire code.
2 Or "M+S 004D"for winter tires Wheels and tires
393

th
ese are ins talled on theve hicle, but does not
include passengers or luggage.
Maximum tire load: the maximum tire load is
th e maximum permissible weight in kilog rams or
lbs for which a tire is appr oved.
Maximum permissible tire pressure: maxi‐
mum permissible tire pressure for one tire.
Maximum load on one tire: maximum load on
one tire. This is calculated bydividing the maxi‐
mum axle load of one axle bytwo.
PSI (pounds per square in ch):standard unit of
measurement for tire pressu re.
Aspect ratio: ratio between tire height and tire
width in pe rcent.
Ti re pressure: pressure inside the tire applying
an outward forc eto eve rysquare inch of the tire.
The tire pressure is specified in pounds per
square inch (psi), in kilopascals (kPa) or in bar.
The tire pressure should only be cor rected when
th e tires are cold.
Cold tire pressure: the tires are cold when the
ve hicle has been par kedfo r at least 3 hours without direct sunlight on
the tires or theve hicle
has been driven for less than 1 mile (1.6 km).
Ti re contact sur face: the part of the tire that
comes into con tact wi th thero ad.
Ti re bead: the purpose of the tire bead is to
ensure that the tire sits securely on the wheel
ri m. There are se veral wire cores in the tire bead
to preve ntthe tire from changing length on the
wheel rim.
Side wall:the part of the tire between the tread
and the tire bead.
We ight of optional equipment: the combined
we ight of the optional equipment weighing more
th an there placed standard parts and more than
5 lbs (2.3 kg).This optional equipment, such as
high-per form ance brakes, le vel control sy stem, a
ro of luggage rack or high-per form ance bat teries,
is not included in the curb weight and thewe ight
of the accessories.
TIN (Tire Identification Number): a unique
identification number which can be used by a
tire manufactu rerto identify tires, forex ample,
in a product recall, and thus identify the pur‐
ch asers. The TIN is made up of the manufactur‐ er's identity code, tire size, tire type code and
th e manufacturing date.
Load-bearing index: the load-bearing index is a
code that con tains the maximum load-bearing
capacity of a tire.
Tr action: traction is the grip resulting from fric‐
tion between the tires and thero ad sur face.
We ar indicator: narrow bars (tread wear bars)
th at are distributed overth e tire conta ct surface.
If th e tire tread is le vel with the bars, thewe ar
limit of 1/ 16in (1.6 mm) has been reached.
Distribution of vehicle occupants: distribution
of vehicle occupants over designated seat posi‐
tions in a vehicle.
Maximum permissible pa yload weight: nomi‐
nal load and luggage load plus 150 lb (68 kg)
multiplied bythe number of seats in theve hicle. Wheels and tires
395

Saf
ety sy stems Display messages
Possible causes/consequences and 0050
0050Solutions
00E5 Currently Unavailable See
Operator's Manual *
ESP ®
is temp orarily una vailable.
Other driving sy stems and driving saf ety sy stems may also malfunction. &
WARNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning, ESP ®
cannot car ryout vehicle stabilization. In addition, other driving saf ety sy stems
are switched off. #
Drive on carefull y. #
Have ESP ®
ch ecked at a qualified specialist workshop. #
Carefully drive on a suitable stre tch of road, making slight steering mo vements at a speed abo ve19 mph
(30 km/h). #
Ifth e display message does not disappear, consult a qualified specialist workshop immediately. Drive carefully.
0049 (USA only)
0024 *
The red0049 (USA only) or 0024indicator lamp (Canada only) is lit.
Yo u ha veattem ptedto release the electric parking brake with the ignition switched off. #
Switch the ignition on. Display messages and
warning/indicator lamps 419

Display messages
Possible causes/consequences and 0050
0050Solutions #
Have ABS and ESP ®
ch ecked immediately at a qualified specialist workshop. #
Carefully drive on a suitable stre tch of road, making slight steering mo vements at a speed abo ve19 mph
(30 km/h). #
Ifth e display message does not disappear, consult a qualified specialist workshop immediately. Drive carefully.
0025
00E5
Inoperative See Operator's
Manual *
ABS and ESP ®
are malfunctioning.
Other driving sy stems and driving saf ety sy stems may also malfunction.
The brake sy stem continues tooperate normally. The braking dis tance in an emergency braking situation can
increase. &
WARNING Risk of skidding if ABS and ESP ®
are malfunctioning
If ABS and ESP ®
are malfunctioning, the wheels could lock when braking and ESP ®
cann otcar ryout vehicle
st abilization.
The steering capability and braking characteristics are thus se verely impaired. The br aking distance in an emer‐
ge ncy braking situation can increase. In addition, other driving saf ety sy stems are switched off. #
Drive on carefull y. #
Have ABS and ESP ®
ch ecked immediately at a qualified specialist workshop. #
Drive on carefully. #
Visit a qualified specialist workshop immediatel y.426
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
De tection of a restra int sy stem malfunction:
R The 0075 restra int sy stem warning lamp does not light up when the ignition is switched on.
R The 0075 restra int sy stem warning lamp lights up continuously or repeatedly during a journe y. #
Visit a qualified specialist workshop immediatel y.
0075
Front Left Malfunction
Service Required (Example)*T
he cor responding restra int sy stem is malfunctioning (→ page31). &
WARNING Risk of inju ryor fata l injury due toa malfunction in there stra int sy stem
If th ere stra int sy stem is malfunctioning, restra int sy stem components may be triggered unintentionally or
might not be triggered at all in theeve nt of an accident. This may af fect the Emer gency Tensioning Device or
airbag, forex ample. #
Have there stra int sy stem checked and repaired immediately at a qualified specialist workshop. De
tection of a restra int sy stem malfunction:
R The 0075 restra int sy stem warning lamp does not light up when the ignition is switched on.
R The 0075 restra int sy stem warning lamp lights up continuously or repeatedly during a journe y. #
Visit a qualified specialist workshop immediatel y.
0075 *T
he cor responding window cur tain airbag is malfunctioning (→ page31). 428
Display messages and warning/indicator lamps

Display messages
Possible causes/consequences and 0050
0050Solutions
While stationary, apply the
brakes before operating
the soft top.
0058
Trunk Partition Open *T
he trunk partition is open. #
Close the trunk partition. Lights
Display messages
Possible causes/consequences and 0050 0050Solutions
0049 Intell. Light System Inoper-
ative *T
he Intelligent Light Sy stem is defective. The lighting sy stem continues tofunction properly without the functions of
th e Intelligent Light Sy stem. #
Visit a qualified specialist workshop.
0049 Check Left Low
Beam (Example) *T
he cor responding light source is defective. #
Drive on carefully. #
Visit a qualified specialist workshop immediatel y. Displ
aymessa ges and warning/indicator lamps 461

Display messages
Possible causes/consequences and 0050
0050Solutions
% LED light bulbs: the display message forth e cor responding lamp appears only when allthe light-emitting diodes
in the lamp ha vefailed.
0049 Active Headlamps Inopera-
tive *T
he active headlamp s are defective. #
Visit a qualified specialist workshop.
0049 Switch Off Lights *Y
ou are leaving theve hicle and the lights are still switched on. #
Turn the light switch tothe0058 position.
0049 Malfunction See Opera-
tor’s Manual *T
heexterior lighting is defective. #
Visit a qualified specialist workshop.
0049 Switch On Headlamps *Y
ou are driving without lo w-beam headlamps. #
Turn the light switch tothe0058 or0058 position. 462
Display messages and warning/indicator lamps