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139 Emission control
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Emission control
Certain systems of the engine serve to keep the toxic
components of the exhaust gases within permissible
limits required by law.
These systems, of course, will function properly only
when maintained strictly according to factory
specifications. Any adjustments on the engine should,
therefore, be carried out only by qualified Mercedes-
Benz Center authorized technicians. Engine
a dju stments sh ould not be a ltered in a ny way. M oreover,
the specified service jobs must be carried out regularly
according to Mercedes-Benz servicing requirements.
For details refer to the Service Booklet.
Wa r n i n g !
Inhalation of exhaust gas is hazardous to your
health. All exhaust gas contains carbon monoxide,
and inhaling it can cause unconsciousness and
lead to death.Do not run the engine in confined areas (such as a
garage) which are not properly ventilated. If you
think that exhaust gas fumes are entering the
vehicle while driving, have the cause determined
and c orrec ted imm ediately. If you m ust dri ve under
these conditions, drive only with at least one
window fully open.
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141 Steering lock
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Notes:
A warning sounds when the driver’s door is opened
while the key is in steering lock position 1 or 0.
With the engine at idle speed, the charging rate of the
alternator (output) is limited.
It is therefore recommended that you turn off
unnecessary electrical consumers while driving in stop-
a nd-go tra ff ic. This preca ution h elps to avoid d ra ining of
the battery.
Unnecessary strain on the battery and charging system
may be minimized by turning off the following power
consumers, for example: Heated seats, rear window
defroster.Caution!
To prevent accelerated battery discharge and a possible
dead battery, always remove the key from the steering
lock. Do not leave the key in steering lock position 0.
Page 164 of 273

161 Driving instructions
Te ch n ica l
data Instruments
and controlsOperationDrivingInstrument
cluster displayPractical hints Car care Index Winter driving
Have your vehicle winterized at your authorized
Mercedes-Benz Center before the onset of winter.
•Change the engine oil if the engine contains an oil
which is not approved for winter operation. For
viscosity (SAE / CCMC class) and filling quantity,
see page 252.
•Check engine coolant anticorrosion / antifreeze
concentration.•Additive for the windshield washer and headlamp
cleaning system: Add MB Concentrate “S” to a
premixed windshield washer solvent / antifreeze
which is formulated for below freezing
temperatures, see page 195.
•Test battery: Battery capacity drops with decreasing
ambient temperature. A well charged battery helps
to ensure t ha t t he engine c an be sta rted, even at l ow
ambient temperatures.
•Tires: We recommend M+S rated radial-ply tires on
all four wheels for the winter season. Observe
permissible maximum speed for M+S rated radial-
ply tires and the legal speed limit.
Note:
In winter operation, the maximum effectiveness of the
antilock brake system (ABS) or electronic stability
program (ESP) can only be achieved with M+S rated
radial-ply tires and / or snow chains recommended by
Mercedes-Benz. Snow chains maximize performance.
Wa r n i n g !
If the vehicle becomes stuck in snow, make sure
that snow is kept clear of the exhaust pipe and
from around the vehicle with engine running.
Otherwise, deadly carbon monoxide (CO) gases may
enter vehicle interior resulting in unconsciousness
and death.To assure sufficient fresh air ventilation, open a
window slightly on the side of the vehicle not
facing the wind.
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226 Emergency engine shut-down
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
Emergency engine shut-down
If the engine can no longer be stopped using the key, the
engine can be turned off by removing two fuses.
For easy removal of fuses use the fuse extractor
(supplied with vehicle tool kit) to pull out the fuses
marked on the fuse chart as “ENGINE EMERGENCY
OFF”.
The fuse chart is also located in the vehicle tool kit,
see page 196.
For fuses see page 188.Raising hardtop manually
In case of malfunction, the hardtop can also be raised
manually. This procedure should be performed with
great care by 2 persons.
Prior to raising the hardtop manually, make certain that
all points listed under Retractable Hardtop (see
page 120) were observed.
A hex-socket wrench, located on the inside of the
right-hand cover in the trunk, is required for this job.
1.Open doors or lower windows.
2.For safety reasons, remove key from steering lock.
3.Open trunk.
Page 233 of 273
230 Raising hardtop manually
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar care Index
11.R e m o v e c a p f r o m h e a d l i n e r .
To close hardtop:
Insert hex-socket wrench and turn clockwise (7) to
its stop.
To lo ck ha rd top :
Turn wrench counterclockwise (8) to its stop.12.Close trunk lid by placing flat hands near edges
(arrows).
Notes:
The rear quarter windows cannot be closed.
Have the hardtop operation checked at your authorized
Mercedes-Benz Center as soon as possible.
87P65.10-2115-26
SOS
P65.10-2111-26
Page 236 of 273

233 Contents - Vehicle care
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar careIndex
Vehicle careCleaning and care
of the vehicle .............................234
Power washer ..............................235
Paintwork, painted body
components .................................235
Tar stains .....................................235
Engine cleaning ..........................236
Vehicle washing .........................236
Headlamps, taillamps,
turn signal lenses ......................237
Window cleaning ........................237Rear window cleaning .............. 237
Wiper blades .............................. 238
Light alloy wheels ..................... 238
Instrument cluster ..................... 238
Steering wheel and
gear selector lever ..................... 239
Cup holder .................................. 239
Hard plastic trim items ............. 239
Plastic and rubber parts ........... 239
Headliner and
shelf behind roll bars ................ 239
Upholstery .................................. 239
Seat belts ..................................... 240
Page 237 of 273

234 Cleaning and care of the vehicle
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar careIndex
Cleaning and care of the vehicle
In operation, your vehicle is subjected to varying
external inf luences which, if gone unchecked, can
attack the paintwork as well as the underbody and
cause lasting damage.
Such damage is caused not only by extreme and varying
climatic conditions, but also by air polution, road salt,
tar, gravel and stone chipping. Grease and oil, fuel,
coolant, brake fluid, bird droppings, insects, tree resins
etc. should be removed immediately to avoid paint
damage. Frequent washing reduces and/or eliminates
the aggressiveness and potency of the above adverse
influences.More frequent washings are necessary to deal with
unfavorable conditions; for example, near the ocean, in
industrial areas (smoke, exhaust emissions), or during
winter operation.
You should check your vehicle from time to time for
stone chipping or other damage. Any damage should be
repaired as soon as possible to prevent the start of
corrosion.
In doing so, do not neglect the underside of the vehicle.
A prerequisite for a thorough check is a washing of the
underbody followed by a thorough inspection. Damaged
areas need to be reundercoated.
Your vehicle has been treated at the factory with a wax-
base ru stproof ing in th e body cavities w hich will la st for
the lifetime of the vehicle. Post-production treatment is
neither necessary nor recommended by Mercedes-Benz
because of the possibility of incompatibility between
materials used in the production process and others
applied later.
We have selected car-care products and compiled
recommendations which are specially matched to our
vehicles and which always reflect the latest technology.
You can obtain Mercedes-Benz approved car-care
products at your authorized Mercedes-Benz Center.
Wa r n i n g !
Many cleaning products can be hazardous. Some
are poisonous, others are flammable. Always follow
the instructions on the particular container.
Always open your vehicle’s doors or windows when
cleaning the inside.Never use fluids or solvents that are not designed
for cleaning your vehicle.
Page 240 of 273

237 Cleaning and care of the vehicle
Te ch n ica l
data Instruments
and controlsOperation DrivingInstrument
cluster displayPractical hintsCar careIndex Headlamps, taillamps, turn signal lenses
Use a mild car wash detergent, such as Mercedes-Benz
approved Car Shampoo, with plenty of water.
To prevent scratches, never apply strong force and use
only a soft, non-scratchy cloth when cleaning the lenses.
Do not attempt to wipe dirty lenses with a dry cloth or
sponge.
Window cleaning
Use a window cleaning solution on all glass surfaces. An
automotive glass cleaner is recommended.Rear window cleaning
The corner f la ps of t he rea r sh elf pa rtially cover t he rear
window. This prevents the window from being fully
cleaned with the hardtop closed.
Important!
Do not manually move corner flaps of rear shelf. Doing
so will result in damage to the roof folding mechanism
that is not covered by the Mercedes-Benz Limited
Warranty.
Renewed momentary operation of hardtop switch
extends the time by another 7 minutes.
Wa r n i n g !
If a warning sounds and the indicator lamp in the
hardtop switch blinks, immediately stop cleaning
and move back from window to prevent possible
injury.The hardtop is lowered into its storage
compartment.