Page 305 of 705

304 Controls in detailLocking and unlockingSmartKey
Your vehicle comes supplied with two 
SmartKeys, each with remote control and 
a removable mechanical key. 
The locking tabs for the mechanical key 
portion of the two SmartKeys are of differ-
ent color to help distinguish each 
SmartKey unit.
The SmartKey provides an extended oper-
ating range. To prevent theft, however, it is 
advisable to only unlock the vehicle when 
you are in close proximity to it.
The SmartKey centrally locks and unlocks:
the doors
the trunk
the fuel filler flap
SmartKey with remote control1‹ Lock button
2ŠOpening button for trunk 
(
page 436)
3Mechanical key locking tab
4ŒUnlock button
5Battery check lamp
6ÂPanic button (
page 68)
!
To prevent possible malfunction, avoid ex-
posing the SmartKey to high levels of electro-
magnetic radiation.
Warning!
G
When leaving the vehicle, always remove the 
SmartKey from the starter switch, take it 
with you, and lock the vehicle. Do not leave 
children unattended in the vehicle, or with 
access to an unlocked vehicle. It is possible 
for children to open a locked door from the 
inside, which could result in an accident 
and/or serious personal injury.Warning!
G
To prevent possible personal injury, always 
keep hands and fingers away from the door 
or trunk lid opening when closing a door or 
the trunk. Be especially careful when small 
children are around.
Before closing doors, make sure there is no 
possibility of someone getting caught in a 
door during closing. 
     
        
        Page 536 of 705

535 Operation
Vehicle care
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 an authorized 
Mercedes-Benz Center.
Scratches, corrosive deposits, corrosion or 
damage due to negligent or incorrect care 
cannot always be removed or repaired with 
the car-care products recommended here. 
In such cases it is best to seek aid at an au-
thorized Mercedes-Benz Center.
The following topics deal with the cleaning 
and care of your vehicle and give important 
“how-to” information as well as references 
to Mercedes-Benz approved car-care 
products.Power washer
Tar stains
Quickly remove tar stains before they dry 
and become more difficult to remove. A tar 
remover is recommended.Paintwork, painted body components
Mercedes-Benz approved Paint Care 
should be applied when water drops on the 
paint surface do not “bead up”. This should 
normally be done every 3 to 5 months, de-
pending on the climate and washing deter-
gent used.
Mercedes-Benz approved Paint Cleaner 
should be applied if the paint surface 
shows signs of embedded dirt (i.e. loss of 
gloss).
Do not apply any of these products or wax 
if your vehicle is parked in the sun or if the 
hood is still hot.
Use the appropriate MB-Touch-Up 
Stick for quick and provisional repairs 
of minor paint damage (i.e. chips from 
stones, vehicle doors, etc.).
!
Follow the instructions provided by the pow-
er washer manufacturer on maintaining a dis-
tance between the vehicle and the nozzle of the 
power washer.
Never use a round nozzle to power-wash tires. 
The intense jet of water can result in damage to 
the tire.
Always replace a damaged tire.
Always keep the jet of water moving across the 
surface. Do not aim directly at electrical parts, 
electrical connectors, seals, or other rubber 
parts.
i
Vehicles with KEYLESS-GO*:
If a door handle is hit by a strong jet of water, and 
a SmartKey with KEYLESS-GO* is in close prox-
imity, i.e. within approximately 3 ft. (approxi-
mately 1 m), the vehicle could be inadvertently 
locked or unlocked. 
!
Affixing stickers, adhesive tape or similar 
materials to painted body components may dam-
age the paintwork. 
     
        
        Page 695 of 705

694 IndexRecovery services, Stolen vehicle (Tele 
Aid) 469
Refrigerant, Air conditioning 662, 663
Refueling 489
Regular checks 490
Remote
Control, SmartKey 304
Control, SmartKey with 
KEYLESS-GO* 306
Door lock with Tele Aid 469
Door unlock with Tele Aid 468
Trunk opening switch 436
Trunk opening/closing* switch 437, 
438
Replacing
Bulbs 621
Front lamp bulbs 623
Rear lamp bulbs 622
Reporting safety defects 21
Research Octane Number see RON
Reset (COMAND) 219
Residual engine heat and ventilation 433
Residual heat utilization 677
REST 676REST (Residual engine heat 
utilization) 677
REST see Residual engine heat and ventila-
tion
Rest tool
Depository 618
Restraint systems
Messages in display 605
See Children in the vehicle
See SRS
Reverse gear position, Automatic 
transmission 367, 370
Rims 527
And Tires 655
Tires and wheels 500
Roadside Assistance 16
Tele Aid 465
RON 490, 662, 677
Roof rack* 447
Route guidance (COMAND) 185
Route guidance (Instrument cluster control 
system) 246
Rubber and plastic parts, Cleaning 541
Run Flat Indicator (Canada only) 515S
Safety
Driving safety systems 69
Occupant 44
Reporting defects 21
Safety belts see Seat belts
Satellite radio*
Calling Sirius Service Center 
(COMAND) 103
Channel update (COMAND) 103
Operation (COMAND) 98
Selecting channel (Instrument cluster 
control system) 248
Selecting program category 
(COMAND) 100
Showing program info 
(COMAND) 103
Submenu overview (COMAND) 98
Tuning in channels (COMAND) 100, 
102
Voice Control* 283