2007 MERCEDES-BENZ SL550 page 160

130 Controls in detailLightingDaytime running lamp mode
Turn the exterior lamp switch to
positionM orU.
When the engine is running, the low
beam headlamps are switched on auto-
matically.
In low ambient light conditions, the fol-
lowing lamps will switch on additional-
ly:

Tail lamps


Side marker lamps


Parking lamps


License plate lampsCanada only:
The daytime running lamp mode is manda-
tory and therefore in a constant mode.
When the engine is running and you shift
from a driving position to positionN orP,
the low beam headlamps will switch off
with a three-minute delay.
When the engine is running and you


turn the exterior lamp switch to posi-
tion C, the parking lamps switch on
additionally


turn the exterior lamp switch to posi-
tion B, the manual headlamp mode
has priority over the daytime running
lamp mode
The corresponding exterior lamps
switch on (
page 128).USA only:
By default, the daytime running lamp mode
is deactivated. Activate the daytime run-
ning lamp mode using the control system,
see “Setting daytime running lamp mode
(USA only)” (
page 159).
When the engine is running and you turn
the exterior lamp switch to positionC
or B, the manual headlamp mode has
priority over the daytime running lamp
mode.
The corresponding exterior lamps switch
on (
page 128).
Locator lighting and night security
illumination
Locator lighting and night security illumi-
nation are described in the control system
section, see “Setting locator lighting”
(
page 160) and “Setting night security il-
lumination” (
page 160).

159 Controls in detail
Control system
Lighting submenu
Access the
Lighting
submenu via the
Settings
menu. Use the
Lighting
sub-
menu to change the lamp and lighting set-
tings on your vehicle. The following
functions are available:Setting daytime running lamp mode
(USA only)

Move the selection marker with button
æ or ç to the
Lighting
sub-
menu.

Press button j or k repeatedly
until the message
Light circuit
Headlamp mode
appears in the multi-
function display.
The selection marker is on the current
setting.

Press button æ or ç to select
manual operation (
Manual
) or daytime
running lamp mode (
Constant
).With daytime running lamp mode activated
and the exterior lamp switch at
positionM or U the low beam head-
lamps are switched on when the engine is
running.
In low ambient light conditions the follow-
ing lamps will switch on additionally:


Parking lamps


Tail lamps


License plate lamps


Side marker lamps
Function
Page
Setting daytime running lamp
mode (USA only)
159
Setting locator lighting
160
Setting night security illumina-
tion
160
Setting interior lighting delayed
switch-off
161
i
This function is not available in countries
where the daytime running lamp mode is manda-
tory and therefore in a constant mode.
i
For safety reasons, resetting to factory set-
tings (page 153) while driving will not deacti-
vate the daytime running lamp mode.
The following message appears in the multifunc-
tion display:
Cannot be fully reset to
factory settings when driving
.

305 Operation
Tires and wheels
Summer tires

At the tire manufacturer’s option, any
tire with a speed capability above
149 mph (240 km/h) can include a
“ZR” in the size designation (for exam-
ple: 245/40 ZR18). To determine the
maximum speed capability of the tire,
the service description for the tire must
be referred to. The service description is comprised of the tire load rating5
(
page 302) and the tire speed
rating6 (
page 302).
If your tire includes “ZR” in the size
designation and no service
description5 and6 (
page 302) is
given, the tire manufacturer must be
consulted for the maximum speed ca-
pability.
If a service description5 and6
(
page 302) is given, the speed capa-
bility is limited by the speed symbol in
the service description.
Example: 245/40 ZR18 97Y.
In this example, “97Y” is the service
description. The letter “Y” designates
the speed rating and the speed capabil-
ity of the tire is limited to 186 mph
(300 km/h).


Any tire with a speed capability above
186 mph (300 km/h) must include a
“ZR” in the size designation AND the
service description must be placed in
parenthesis. Example: 275/40 ZR 18
(99Y). The “(Y)” speed rating in paren-
thesis designates the maximum speed
capability of the tire as being above
186 mph (300 km/h). Consult the tire
manufacturer for the actual maximum
permissible speed of the tire.
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)
(Y)
above 186 mph (300 km/h)
ZR
above 149 mph (240 km/h)

306 OperationTires and wheelsAll-season and winter tires
Load identification
1Load identificationIn addition to tire load rating, special load
information may be molded into the tire
sidewall following the letter designating
the tire speed rating1 (
page 306).
No specification given: absence of any text
(like in above example) indicates a
standard load (SL) tire.
XL or Extra Load: designates an extra load
(or reinforced) tire.
Light Load: designates a light load tire.
C, D, E: designates load range associated
with the maximum load a tire can carry at
a specified pressure.
Index
Speed rating
QM+S
1
1or M+S.for winter tires
up to 100 mph (160 km/h)
TM+S
1
up to 118 mph (190 km/h)
HM+S
1
up to 130 mph (210 km/h)
VM+S
1
up to 149 mph (240 km/h)
i
Not all M+S rated tires provide special win-
ter performance. Make sure the tires you use
show M+S and the mountain/snowflake sym-
bol.marking on the tire sidewall. These tires
meet specific snow traction performance re-
quirements of the Rubber Manufacturers Associ-
ation (RMA) and the Rubber Association of
Canada (RAC) and have been designed specifi-
cally for use in snow conditions.
i
For illustration purposes only. Actual data
on tires are specific to each vehicle and may vary
from data shown in above illustration.