Page 270 of 474

269 Controls in detail
Useful features
Remote door unlock
In case you have locked your vehicle unin-
tentionally (e.g. SmartKey inside vehicle), 
and the reserve SmartKey is not handy:
Contact the Mercedes-Benz Response 
Center at 1-800-756-9018 (in the USA) 
or 1-888-923-8367 (in Canada).
You will be asked to provide your pass-
word which you provided when you 
completed the subscriber agreement.
Then return to your vehicle and pull the 
trunk recessed handle for a minimum 
of 20 seconds until the SOS button is 
flashing.
The message 
Connecting Call 
appears in the multifunction display.
As an alternative, you may unlock the vehi-
cle via Internet using the ID and password 
sent to you shortly after the completion of 
your acquaintance call.The Response Center will then unlock your 
vehicle with the remote door unlocking 
feature.Stolen Vehicle Recovery services
In the event your vehicle was stolen:
Report the incident to the police.
The police will issue a numbered inci-
dent report.
Pass this number on to the 
Mercedes-Benz Response Center along 
with your password issued to you when 
you subscribed to the service.
The Response Center will then attempt 
to covertly contact the vehicle’s 
Tele Aid system. Once the vehicle is lo-
cated, the Response Center will con-
tact the local law enforcement and you. 
The vehicle’s location will only be pro-
vided to law enforcement.
iThe remote door unlock feature is available 
if the relevant cellular phone network is avail-
able.
The SOS button will flash and the message 
Connecting Call will appear in the multifunc-
tion display to indicate receipt of the door unlock 
command.
Once the vehicle is unlocked, a Response Center 
specialist may attempt to establish voice contact 
with the vehicle occupants.
If the trunk recessed handle was pulled for more 
than 20 seconds before door unlock authoriza-
tion was received by the Response Center, you 
must wait 15 minutes before pulling the trunk 
handle again.
iWhen the anti-theft alarm or the tow-away 
alarm stays on for more than 30 seconds, a call 
is initiated automatically to the Response 
Center. See “Anti-theft alarm system” 
(
page 90) and “Tow-away alarm” (page 91). 
     
        
        Page 288 of 474

287 Operation
Driving instructions
Standing waterPassenger compartment
Driving abroad
Abroad, there is an extensive 
Mercedes-Benz service network at your 
disposal. If you plan to drive into areas 
which are not listed in the index of your 
Mercedes-Benz Center directory, you 
should request pertinent information from 
an authorized Mercedes-Benz Center.Control and operation of radio 
transmitter
COMAND*, radio, and telephone*
!Do not drive through flooded areas or water 
of unknown depth. Before driving through water, 
determine its depth. Never accelerate before 
driving into water. The bow wave could force 
water into the engine and auxiliary equipment, 
thus damaging them.
If you must drive through standing water, drive 
slowly to prevent water from entering the pas-
senger compartment or the engine compart-
ment. Water in these areas could cause damage 
to electrical components or wiring of the engine 
or transmission, or could result in water being 
ingested by the engine through the air intake, 
causing severe internal engine damage. Any 
such damage is not covered by the 
Mercedes-Benz Limited Warranty.
Warning!G
Always fasten items being carried as 
securely as possible.
In an accident, during hard braking or sud-
den maneuvers, loose items will be thrown 
around inside the vehicle, and cause injury 
to vehicle occupants unless the items are 
securely fastened in the vehicle.
The trunk is the preferred place to carry 
objects.
Warning!G
Please do not forget that your primary re-
sponsibility is to drive the vehicle safely. 
Only operate the COMAND*, radio or tele-
phone
1 if road, traffic and weather condi-
tions permit.
Bear in mind that at a speed of just 30 mph 
(approximately 50 km/h), your vehicle is 
covering a distance of 44 feet 
(approximately 14 m) every second.
1Observe all legal requirements. 
     
        
        Page 372 of 474
371 Practical hints
What to do if …
Symbol messages
Display symbolDisplay messagePossible cause/consequencePossible solution
ÊThis message will appear whenever 
the trunk lid is open.Close the trunk lid.
OYou are driving with the hood open.Risk of accident!
Stop the vehicle in a safe location or as soon 
as it is safe to do so.
Apply the parking brake (page 59).
Close the hood (page 294).
JYou are driving with one or more 
doors open.Close the doors.
•The cooling fan for the coolant is 
malfunctioning.Observe the coolant temperature display 
(
page 127).
If the coolant temperature is below 120°C, 
you may continue driving to the nearest 
specialist workshop.
Avoid heavy loads on the engine (e.g. by 
driving uphill) as well as stop-and-go traffic.
Have the fan replaced as soon as possible. 
     
        
        Page 389 of 474
388 Practical hints
What to do if …
Display symbolDisplay messagePossible cause/consequencePossible solution
tPHONE OFFThis display appears if buttons 
ort on the multifunction steer-
ing wheel is pressed and the vehicle 
is not equipped with a telephone*.
MTrunk Partition
OpenYou are trying to open or close the 
retractable hardtop even though 
the luggage cover in the trunk is not 
closed and/or properly engaged.Close the luggage cover (page 241).
WTop Up
Washer FluidThe fluid level in the windshield 
washer fluid reservoir has dropped 
below its minimum mark.Add washer fluid (page 301). 
     
        
        Page 390 of 474
389 Practical hints
Where will I find...?
Where will I find...?
First aid kit
The first aid kit is stored in a parcel net 
behind the driver’s seat.Vehicle tool kit, vehicle jack
The vehicle tool kit is stored in a storage 
compartment under the trunk floor.
The following is included:
Collapsible wheel chock
Vehicle jack
Protective wrap (except SLK 55 AMG 
with Performance Package)
Alignment bolt
Towing eye bolt
Wheel wrench
Valve extractor
Electric air pump
TIREFIT kit (SLK 55 AMG with 
Performance Package only)Removing the vehicle tool kit
Vehicles with spare wheel
Open the trunk (page 99).
Lift up trunk floor.
Remove the spare wheel (page 392).
You can now access the vehicle tool 
kit.
iCheck expiration dates and contents for 
completeness at least once a year and replace 
missing/expired items.
 
     
        
        Page 391 of 474

390 Practical hints
Where will I find...?
1Collapsible wheel chock
2Vehicle jack
3Protective wrap
4Alignment bolt
5Towing eye bolt
6Wheel wrench
7Valve extractor
8Electric air pumpVehicles with TIREFIT*
1TIREFIT kit
2Vehicle jack
3Collapsible wheel chock
4Towing eye bolt
5Alignment bolt
6Wheel wrench
7Valve extractor
8Electric air pump
Open the trunk (page 99).
Lift up trunk floor.Vehicle jack
Warning!G
The jack is designed exclusively for jacking 
up the vehicle at the jack take-up brackets 
built into both sides of the vehicle. To help 
avoid personal injury, use the jack only to lift 
the vehicle during a wheel change. Never 
get beneath the vehicle while it is supported 
by the jack. Keep hands and feet away from 
the area under the lifted vehicle. Always 
firmly set parking brake and block wheels 
before raising vehicle with jack.
Do not disengage parking brake while the 
vehicle is raised. Be certain that the jack is 
always vertical (plumb line) when in use, 
especially on hills. Always try to use the jack 
on level surface. Make sure the jack arm is 
fully seated in the jack take-up bracket. Al-
ways lower the vehicle onto sufficient 
capacity jackstands before working under 
the vehicle.
 
     
        
        Page 392 of 474
391 Practical hints
Where will I find...?
The vehicle jack is located in the storage 
compartment underneath the trunk floor.
Storage position
Remove vehicle jack from its 
compartment.
Turn crank handle in the direction of 
arrow as far as it will go.
Operational position
Turn crank handle clockwise.
Before storing the vehicle jack in its 
compartment:
It should be fully collapsed.
The handle must be folded in (storage 
position).Setting up the collapsible wheel chock
The collapsible wheel chock serves to 
additionally secure the vehicle, e.g. while 
changing the wheel.
1Tilt the plate upward
2Fold the lower plate outward
3Insert the plate 
     
        
        Page 393 of 474

392 Practical hints
Where will I find...?
Tilt both plates upward1.
Fold the lower plate outward2.
Guide the tabs of the lower plate all the 
way into the openings of the base 
plate3.
For information on where to place wheel 
chocks when changing a wheel, see 
“Lifting the vehicle” (
page 414).
Spare wheel with collapsible tire
The spare wheel is located in the storage 
compartment underneath the trunk floor.
1Spare wheel, spare wheel bolts 
(located under plastic cover on the 
outside of spare wheel rim)
2Vehicle tool kit (under spare wheel)
3Retaining screwOpen the trunk (page 99).
Lift up trunk floor.
Loosen retaining screw3by turning it 
counterclockwise.
Remove spare wheel1.
Take off the wheel bolts for spare 
wheel1.
Storing the spare wheel with 
collapsible tire
If you wish to store the spare wheel after 
use, carry out the following steps. Other-
wise the spare wheel will not fit the storage 
compartment.
Unscrew the valve cap from the valve 
of the collapsible tire.
Take the valve extractor from the vehi-
cle tool kit (
page 389).
!Make sure the collapsible tire is dry when 
storing it.