240 Controls in detailUseful features1Cigarette lighter
Push in cigarette lighter1.
The lighter will pop out automatically
when hot.
Heated steering wheel*
The steering wheel heating warms up the
leather area of the steering wheel.
The stalk is located on the lower left-hand
side of the steering wheel.
1Switching on
2Switching off
3Indicator lamp
!
The lighter socket can accommodate
12V DC electrical accessories (up to a maximum
of 85 W) designed for use with the standard
“cigarette lighter” plug type. Keep in mind, how-
ever, that connecting accessories to the lighter
socket (for example extensive connecting and
disconnecting, or using plugs that do not fit prop-
erly) can damage the lighter socket. With the
socket damaged, the lighter may no longer be
able to be placed in the heating (pushed-in) posi-
tion, or the lighter may pop out too early with the
lighter not hot enough.
To help avoid damaging the cigarette lighter
socket, we recommend connecting 12V DC elec-
trical accessories designed for use with the stan-
dard “cigarette lighter” plug type to the
12V power outlet (
page 242) in your vehicle
whenever possible.
241 Controls in detail
Useful features
Switching on
Switch on the ignition (
page 39).
Turn the switch at the tip of the stalk in
direction of arrow1.
The steering wheel is heated. Indicator
lamp3 comes on.
Switching off
Turn switch at the tip of the stalk in
direction of arrow2.
The steering wheel heating is switched
off. Indicator lamp3 goes out.For more information on the steering
wheel, see “Multifunction steering wheel”
(
page 140).
Load assist in the trunk
To facilitate trunk loading after opening the
trunk lid, use the load assist feature to
raise the retracted hardtop from its stor-
age position in the trunk.
i
The steering wheel heating is temporarily
suspended while indicator lamp3 remains on
when
the temperature of the vehicle interior is
above 86°F (30°C)
the temperature of the steering wheel is
above 95°F (35°C)
When these conditions do not apply anymore,
steering wheel heating continues.
i
Indicator lamp 3 flashes or switches off
in case of power surge or undervoltage
in case of a steering wheel heating malfunc-
tion
i
The steering wheel heating switches off au-
tomatically when you remove the SmartKey from
the starter switch or, on vehicles with
KEYLESS-GO*, when you switch off the ignition
(
page 40) and open the driver’s door.
Warning!
G
To prevent injuries, make sure that there is
no possibility of body parts getting caught in
moving parts. If potential danger exists,
press the switch again. This will immediately
stop the movement of the hardtop.
260 OperationDriving instructionsPower assistance
Brakes
Warning!
G
The brake system requires electrical energy
for operation.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its emer-
gency operation mode. In such a case, the
red brake warning lamp (
page 335) and
warning messages (
page 347) in the in-
strument cluster come on while driving. To
brake, the driver must then apply signifi-
cantly greater brake pedal pressure and de-
press the pedal much further to obtain the
expected braking effect. If necessary, apply
full pressure to the brake pedal. Brakes are
only applied to the front wheels. Stopping
distance is increased! If there is a malfunc-
tion in the electro-hydraulic brake system,
we recommend that the vehicle be trans-
ported with all wheels off the ground using
flatbed or appropriate wheel lift/dolly equip-
ment.
A tow bar must be used if circumstances do
not permit the use of the recommended
towing methods and the vehicle requires
towing with all four wheels on the ground.
Towing the vehicle with all four wheels on
the ground is only permissible for distances
up to 30 miles (50 km) and at a speed not to
exceed 30 mph (50 km/h). For more infor-
mation, see “Towing the vehicle”
(page 421).
With the engine not running, there is no
power assistance for the brake and steering
systems. In this case, it is important to keep
in mind that a considerably higher degree of
effort is necessary to brake and steer the ve-
hicle.
Warning!
G
After driving in heavy rain for some time
without applying the brakes or through wa-
ter deep enough to wet brake components,
the first braking action may be somewhat
reduced and increased pedal pressure may
be necessary to obtain expected braking ef-
fect. Maintain a safe distance from vehicles
in front.
Resting your foot on the brake pedal will
cause excessive and premature wear of the
brake pads.
It can also result in the brakes overheating
thereby significantly reducing their effec-
tiveness. It may not be possible to stop the
vehicle in sufficient time to avoid an acci-
dent.
261 Operation
Driving instructions
To help prevent brake disk corrosion after
driving on wet road surfaces (particularly
salted roads), it is advisable to brake the
vehicle with considerable force prior to
parking. The heat generated serves to dry
the brakes.
If your brake system is normally only sub-
jected to moderate loads, you should occa-
sionally test the effectiveness of the
brakes by applying above-normal braking
pressure at higher speeds. This will also
enhance the grip of the brake pads.
Refer to the description of the Brake Assist
System (BAS) (
page 89).If the parking brake is released and the
brake warning lamp in the instrument clus-
ter stays on, there is a malfunction in the
electro-hydraulic brake system
(
page 92) or the brake fluid level in the
reservoir is too low.
Brake pad wear or a leak in the system may
be the reason for low brake fluid in the res-
ervoir.
Have the brake system inspected immedi-
ately.
All checks and service work on the brake
system should be carried out by qualified
technicians only. Contact an authorized
Mercedes-Benz Center.
Only install brake pads and brake fluid rec-
ommended by Mercedes-Benz.
After hard braking, it is advisable to drive
on for some time, rather than to park im-
mediately, so the air stream will cool down
the brakes faster.
Warning!
G
Make sure not to endanger any other road
users when carrying out these braking
maneuvers.
Warning!
G
If other than recommended brake pads are
installed, or other than recommended brake
fluid is used, the braking properties of the
vehicle can be degraded to an extent that
safe braking is substantially impaired. This
could result in an accident.
Be certain to read and observe the warning
notices on brake pad replacement
(page 94).
!
When driving down long and steep grades,
relieve the load on the brakes by shifting into a
lower gear to use the engine’s braking power.
This helps prevent overheating of the brakes and
reduces brake pad wear.
334 Practical hintsWhat to do if …Problem
Possible cause/consequence
Suggested solution
-
The yellow ABS indicator lamp
comes on while driving.
The ABS has detected a malfunction and has
switched off. The BAS and the ESP
® are also
switched off (see messages in display).
The electro-hydraulic brake system is still
functioning normally but without ABS avail-
able.
If the ABS control unit is malfunctioning, oth-
er systems such as Parktronic*, Distronic*,
or the automatic transmission may also be
malfunctioning.
Continue driving with added caution.
Wheels may lock during hard braking,
reducing steering capability.
Have the system checked at an autho-
rized Mercedes-Benz Center as soon
as possible.
Failure to follow these instructions in-
creases the risk of an accident.
Read and observe messages in the
display (
page 347).
The charging voltage has fallen below
10 volts and the ABS was switched off.
The battery may not be sufficiently charged.
Switch off electrical consumers that
are currently not needed, e.g. seat
heating.
If necessary, have the generator and
battery checked.
When the voltage is above this value
again, the ABS is operational again.
337 Practical hints
What to do if …
Problem
Possible cause/consequence
Suggested solution
ú
(USA only)
±
(Canada only)
The yellow engine malfunction
indicator lamp comes on while
driving.
Your fuel tank is empty.
After refueling, start, turn off, and re-
start the engine three or four times in
succession.
The limp-home mode is canceled. You
do not need to have your vehicle
checked.
D
The red coolant warning lamp
comes on when the engine is
running.
There is insufficient coolant in the reservoir.
If this warning lamp comes on frequently,
there is a leak in the cooling system.
If the coolant level is correct, the electric ra-
diator fan may be broken.
Immediately add coolant to prevent
engine from overheating
(page 280).
Have the cooling system checked.
If the coolant temperature is below
248 °F (120 °C), you can continue
driving to the nearest authorized
Mercedes-Benz Center.
Avoid high engine loads (e.g. driving
uphill) and stop-and-go driving.
D
The red coolant warning lamp
comes on while driving and you
hear a warning sound.
The coolant temperature has exceeded
248 °F (120 °C).
Stop in a safe location as soon as pos-
sible and allow the engine and coolant
to cool down.
464 IndexR
RACETIMER see Control system menus,
AMG menu
Radio
Operating 149
Satellite 150
Selecting station 149
Radio transmitters
Control and operation 268
Range (distance to empty)
Calling up 165
Reading lamp 33
Rear lamps see Tail lamps
Rear luggage compartment 237
Rear view mirrors see Mirrors
Recommended inflation pressure 313
Redial memory 167
Refueling 271
Regular checks 272
Regular driving style 228
Remote
Trunk opening/closing* switch 114
Remote trunk opening switch 112
Remote trunk opening/closing*
switch 113Replacing
Batteries (SmartKey) 395
High beam bulbs 400
Low beam bulbs 400
Rear lamp bulbs 398, 402
Wiper blades 403
Reset button 27
Resetting
All functions (control system) 153
Fuel consumption statistics 164
Trip odometer 137
Restraint systems 66
Emergency Tensioning Device
(ETD) 81
Messages in the multifunction
display 361
Seat belts 66, 77
Resume function
Cruise control 212
Distronic* 220
Retractable hardtop
Closing (SmartKey) 201
Closing (switch) 200
Convenience feature 201
Locking after raising/lowering 202Opening (SmartKey) 201
Opening (switch) 200
Problems when operating 203
Summer opening feature 201
Rim 313
Roll bar 81
Lowering 82
Messages in display 384
Raising 82
Warning lamp 29
Roll bar buttons 32
RON 272
Rubber parts, cleaning 328
Run Flat Indicator (Canada only) 293
S
Satellite radio 150
Seat belt force limiter 81
Seat belts 49, 66, 77
Cleaning 329
Messages in the multifunction
display 361
Warning lamp 341
Seat heating
Switching on 123
Seat ventilation* 125
Switching on 125
465 Index
Seating capacity 287
Seats
Adjusting height 43
Adjusting lumbar support 122
Adjusting shoulder support 122
Heating 123
Massage function 122
Moving 121
Self-test
OCS 76
Service
Basic service (Service A) 319
Batteries 414
Extended service (Service B) 319
Types 319
Service life (tires) 284
Service System see Maintenance
Settings
Clock 157
Convenience functions 162
Cruise control 212
Daytime running lamp mode 159
Interior lighting delayed
switch-off 161
Lamps and lighting
(control system) 159Language, multifunction display 157
Locator lighting 160
Miles/kilometers in
speedometer 156
Night security illumination 160
Resetting all (control system) 153
Selective (SmartKey with
KEYLESS-GO*) 109
Selective (SmartKey) 104
Speedometer display mode 156
Time 157
Units in speedometer 156
Shifting
Gear selector lever 168
Gear selector lever positions 170
Into optimal gear range (Automatic
transmission) 175
Shoulder support
Seat adjustment 122
Side marker lamps 398
Cleaning lenses 325
Side windows
Automatic closing 198
Automatic opening 197
Closing 196, 197
Closing fully 198Closing with KEYLESS-GO* 198
Express-close 198
Express-open 197
Opening 196, 197
Opening fully 197
Stopping 198
Synchronizing power windows 198
Sidewall 313
SmartKey 102
Batteries 395
Checking the batteries 105
Closing retractable hardtop 201
Global locking 103, 104
Global unlocking 103
Loss of 105
Positions in starter switch 40
Restoring factory settings 104, 109
Selective setting 104
Starter switch positions 40
Starting the engine 52
Turning off the engine 62
SmartKey with KEYLESS-GO*
Checking the batteries 110
Global locking 108, 109
Global unlocking 108
Locking 110