Page 83 of 464

83 Safety and Security
Driving safety systems
For more information, see “Practical Hints” 
(page 345).Switching off the ESP
To improve the vehicle’s traction, turn off 
the ESP in driving situations where it would 
be advantageous to have the drive wheels 
spin and thus cut into surfaces for better 
grip such as:
starting out on slippery surfaces and in 
deep snow in conjunction with snow 
chains
in sand or gravel
Warning!
G
The ESP cannot prevent the natural laws of 
physics from acting on the vehicle, nor can 
it increase the traction afforded. The ESP 
cannot prevent accidents, including those 
resulting from excessive speed in turns, or 
hydroplaning. Only a safe, attentive, and 
skillful driver can prevent accidents. The ca-
pabilities of an ESP equipped vehicle must 
never be exploited in a reckless or danger-
ous manner which could jeopardize the us-
er’s safety or the safety of others.iThe ESP will only function properly if 
you use wheels of the recommended 
tire size (
page 413).
!Because of the ESP’s automatic opera-
tion, the engine must be turned off 
(SmartKey in starter switch position0 
or1) when
the parking brake is being tested on 
a brake test dynamometer
the vehicle is being towed with the 
front axle raised
Active braking action through the ESP 
may otherwise seriously damage the 
brake system.
Warning!
G
The ESP should not be switched off during 
normal driving other than in the circum-
stances described below. Disabling of the 
system will reduce vehicle stability in stan-
dard driving maneuvers.!Turn on the ESP immediately if the 
aforementioned circumstances do not 
apply anymore. 
     
        
        Page 150 of 464

150 Controls in detailManual transmissionManual transmission is standard equip-
ment on select models and not available 
on all models.
For information on driving with a manual 
transmission, see “Manual transmission” 
(page 48).
Warning!
G
For vehicles equipped with a manual trans-
mission, getting out of your vehicle with the 
gearshift lever not engaged in first or re-
verse gear and parking brake engaged is 
dangerous.
Also, when parked on an incline, an engaged 
first or reverse gear alone may not prevent 
your vehicle from moving, possibly hitting 
people or objects.
Always set the parking brake in addition to 
engaging first or reverse gear (
page 56).
When parked on an incline, turn front wheels 
towards the road curb.
Do not park this vehicle in areas where com-
bustible materials such as grass, hay or 
leaves can come into contact with the hot 
exhaust system, as these materials could be 
ignited and cause a vehicle fire.
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. Children 
could move the gearshift lever, which could 
result in an accident and/or serious injury.Warning!
G
On slippery road surfaces, never downshift 
in order to obtain braking action.
This could result in drive wheel slip and re-
duced vehicle control. Your vehicle’s ABS 
will not prevent this type of loss of control. 
     
        
        Page 153 of 464

153 Controls in detail
Automatic transmission*
1Current gear range/gear selector lever 
position
2Current program mode
The current gear range/gear selector lever 
position and program mode (
C/S) or 
(
M/C/S) appear in the multifunction 
display.When the gear selector lever is in 
positionD, you can influence transmission 
shifting by:
limiting the gear range
changing gears manually
Warning!
G
It is dangerous to shift the gear selector 
lever out ofP orN if the engine speed is 
higher than idle speed. If your foot is not 
firmly on the brake pedal, the vehicle could 
accelerate quickly forward or reverse. You 
could lose control of the vehicle and hit 
someone or something. Only shift into gear 
when the engine is idling normally and when 
your right foot is firmly on the brake pedal.
!Allow engine to warm up under low 
load use. Do not place full load on the 
engine until the operating temperature 
has been reached.
Shift into reverse gearR or parking 
positionP only when the vehicle is 
stopped.
Avoid spinning of a drive wheel for an 
extended period when driving off on 
slippery road surfaces. This may cause 
serious damage to the drivetrain which 
is not covered by the Mercedes-Benz 
Limited Warranty. 
     
        
        Page 156 of 464

156 Controls in detailAutomatic transmission*Gear selector lever position
Effect
ì
Park position 
Gear selector lever position 
when the vehicle is parked. Place 
gear selector lever in positionP 
only when vehicle is stopped. 
The park position is not intended 
to serve as a brake when the 
vehicle is parked. Rather, the 
driver should always set the 
parking brake in addition to 
placing the gear selector lever in 
positionP to secure the vehicle.
EffectThe SmartKey can only be 
removed from the starter switch 
with the gear selector lever in 
positionP. With the SmartKey 
removed, the gear selector lever 
is locked in positionP.
If the vehicle’s electrical system 
is malfunctioning, the gear 
selector lever could remain 
locked in positionP 
(page 376).
í
Reverse gear 
Place gear selector lever in 
positionR only when vehicle is 
stopped.
Effect
ë
Neutral
No power is transmitted from the 
engine to the drive axle. When 
the brakes are released, the 
vehicle can be moved freely 
(pushed or towed).
To avoid damage to the trans-
mission, never engageN while 
driving.
If the ESP is deactivated or 
malfunctioning:
Move gear selector lever toN 
only if the vehicle is in danger of 
skidding, e.g. on icy roads.
ê
Drive 
The transmission shifts 
automatically. All forward gears 
are available. 
     
        
        Page 157 of 464

157 Controls in detail
Automatic transmission*
!
Coasting the vehicle, or driving for any 
other reason with gear selector lever 
inN can result in transmission damage 
that is not covered by the 
Mercedes-Benz Limited Warranty.
Warning!
G
Getting out of your vehicle with the gear 
selector lever not fully engaged in positionP 
is dangerous. Also, positionP alone is not 
intended to or capable of preventing your 
vehicle from moving, possibly hitting people 
or objects.
Always set the parking brake in addition to 
shifting to positionP (
page 49).
When parked on an incline, turn the front 
wheels towards the road curb.
Do not park this vehicle in areas where 
combustible materials such as grass, hay or 
leaves can come into contact with the hot 
exhaust system, as these materials could be 
ignited and cause a vehicle fire.
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. Children 
could move the gear selector lever from 
positionP, which could result in an accident 
and/or serious personal injury. 
     
        
        Page 159 of 464
159 Controls in detail
Automatic transmission*
Driving tips
Accelerator position
Your driving style influences the 
transmission’s shifting behavior:
Less throttle Earlier upshifting
More throttle  Later upshiftingKickdown 
Use kickdown when you want maximum 
acceleration.
Press the accelerator past the point of 
resistance.
The transmission shifts into a lower 
gear.
Ease on the accelerator when you have 
reached the desired speed. 
The transmission shifts up again.Stopping
When you stop briefly, e.g. at traffic lights:
Leave the transmission in gear.
Hold the vehicle with the brake.
When you stop longer with the engine 
idling or on an uphill gradient:
Move the gear selector lever to 
positionP.
Set the parking brake. 
     
        
        Page 160 of 464
160 Controls in detailAutomatic transmission*Maneuvering
When you maneuver in tight areas, 
e.g. when pulling into a parking space:
Control the vehicle speed by gradually 
releasing the brakes.
Accelerate gently.
Never abruptly step on the accelerator.Working on the vehicle
Steering wheel gearshift control
When driving in the automatic program 
modesC orS, or in the manual program 
modeM (SLK 55 AMG only), you can 
change the gears manually on the steering 
wheel or by using the gear selector lever 
(page 154).
Warning!
G
When working on the vehicle, set the 
parking brake and move gear selector lever 
to positionP. Otherwise the vehicle could 
roll away.
iTo avoid overrevving the engine when 
downshifting with steering wheel 
gearshift buttons, the transmission will 
not shift to a lower gear if the engine’s 
max. speed would be exceeded. 
     
        
        Page 239 of 464
239 Controls in detail
Retractable hardtop
The switch for opening/closing the retract-
able hardtop is on the lower part of the 
center console.Retractable hardtop switch1Opening
2Closing
For operating the power windows with the 
retractable hardtop switch (
page 234).Opening
Push and hold the retractable hardtop 
switch in direction of arrow1 until the 
retractable hardtop is completely low-
ered into the trunk.
The message 
Retractable roof open
 
briefly appears in the multifunction dis-
play.
Closing
Push and hold the retractable hardtop 
switch in direction of arrow2 until the 
retractable hardtop is completely 
closed and locked.
The message 
Retractable roof 
closed
 briefly appears in the multifunc-
tion display.
iBefore operating the retractable hard-
top via the retractable hardtop switch, 
do the following first:
Engage the parking brake 
(page 56).
Close the luggage cover.
Close the trunk lid.
Switch on ignition (
page 35).