
SmartKey
Overview of SmartK eyfunctions
&
WARNING ‑ Danger of accident or injury
if ch ildren are left unatte nded intheve hi‐
cle
If ch ildren are left unatte nded intheve hicle,
th ey could:
Ropen doo rs,th ereby endangering other
persons or road users.
Rge t out of theve hicle and be hit by
oncoming traf fic.
Rope rate ve hicle equipment.
Moreo ver,ch ildren could also set theve hicle
in motion by,fo rex ample:
Rreleasing the parking brake.
Rshifting the automatic transmission out of
park position P jor shifting manual
transmission into idle position.
Rst arting the engine.
#Ne ver lea vechildren and animals unat‐
te nded in theve hicle.
#When leaving theve hicle, alw aysta ke
th eke ywit hyo u and lock theve hicle.
#Ke ep theve hicle keyout of there ach of
ch ildren.
* NO
TEDama getotheke ycaused by
magnetic fields
#Ke ep theke yaw ay from strong mag‐
netic fields.1Loc ks
2Battery check lamp
3Unloc ks
4Opens/closes theta ilgate
5Pa nic alarm
The Smart Keyloc ksand unlo cksth efo llowing
components:
RThe doors
RThe tailgate
RThe fuel filler flap
56
Opening and closing

#Depress the brake pedal and shift toneutral
i.
#Re lease the brake pedal.
#Switch the ignition off.
% Ifyo uth en exitth eve hicle leaving the
SmartK eyintheve hicle, the automatic trans‐
mission remains in neutral i
Engaging park position P
#Press button 1.
The transmission position display sho wsj
in the multifunction displa y.
Pa rk position jis engaged automatically if one
of thefo llowing conditions is me t:
RIfyo uswit chthe engine off with the trans‐
mission in position hork.
RIfyo u open the driver's door when theve hi‐
cle is stationary or when driving at a very low
speed and the transmission is in position h
or k.
Engaging drive position D
#Depress the brake pedal and push the
DIRECT SELECT le ver down past thefirs t
point of resis tance.
The transmission position displ aysho wsh
in the multifunction displa y.
When the automatic transmission is in transmis‐
sion position h, it shiftsthege ars automati‐
call y.This depends on thefo llowing factors:
RThe selected drive program
RThe position of the accelera tor pedal
RThe road speed
Manual gearshifting
&
WARNING Risk of skidding and of an
accident due toshifting down on slippery
ro ad sur faces
If yo u shift do wnon slippery road sur faces to
inc rease the engine braking ef fect, the drive
wheels may lose traction.
#Do not shift down on slippery road sur‐
fa ces toinc rease the engine braking
ef fect.
Driving and park ing15
3

#Toactivate: pullsteering wheel gearshift
paddle 1or2.
Manual gearshifting is activated for a short
time. The cur rent gear is displa yed in the
multifunction displa y.
#Toshift up: pullsteering wheel gearshift
paddle 2.
#Toshift down: pullsteering wheel gearshift
paddle 1.
#Todeactivate: pullsteering wheel gearshift
paddle 2and hold it in place.
The transmission position
h appears in the multifunction displa y.
% Ifyo u select theManual drive setting in
drive prog ram I, manual gearshifting is per‐
manent lyactivated.
Mercedes -AMG vehicles: make sure that you
re ad the separate operating instructions. Other‐
wise, you may not recognize dangers.
Shift recommendation
Mercedes -AMG vehicles: make sure that you
re ad the separate operating instructions. Other‐
wise, you may not recognize dangers.
The gearshift recommendations assist you in
adopting an economical driving style.
#If ge arshift recommendation message 1is
shown in the multifunction displa y,shift to
th ere commended gear.
Using kickdow n
Mercedes-AMG vehicles: make sure that you
re ad the separate operating instructions. Other‐
wise, you may not recognize dangers.
#Maximum acceleration: depress the accel‐
erator pedal be yond the pressure point.
During kickdown, you cannot shift gears using
th esteering wheel gearshift paddles. The auto‐
matic transmission shifts up tothe next gear
when the maximum engine speed is reached to
pr otect the engine from overrev ving.
#Ease off the accelera tor pedal once the
desired speed is reached.
Glide mode function
Mercedes -AMG vehicles: make sure that you
re ad the separate operating instructions. Other‐
wise, you may not recognize dangers.
Wi th an anticipatory driving style, glide mode
helps youto reduce fuel consum ption.
15 4
Driving and pa rking

RThe seat belttongue is not inser ted in the
seat belt buckle of the driver's seat and the
driver's door is opened.
RThere is a sy stem malfunction.
RThe po wer supp lyis insuf ficient.
RThe vehicle is stationary for a lengt hyperiod.
When the electric parking brake is applied, the
F (USA) or !(Canada) indicator lamp
lights up in the instrument clus ter.
The electric parking brake is not automatically
applied if the engine is switched off bythe ECO
st art/ stop function.
Re leasing the electric pa rking brake auto‐
matically
The elect ric park ing brake is released when the
fo llowing conditions are fulfilled:
RThe engine is running.
RThe seat belt tongue is inser ted into the seat
belt buckle of the driver's seat.
RThe transmission is in position hork and
yo udepr essthe accelera tor pedal or you shift from transmission position
jtoh or
k.
RIf th e transmission is in position k,the
trunk lid must be closed.
If th e seat belt tongue is not inser ted into the
seat belt buckle of the driver's seat, thefo llow‐
ing conditions must be fulfilled:
RThe driver's door is closed.
RYo u mo vethe transmission out of transmis‐
sion position joryou ha veprev iously
driven fasterthan 2 mph (3 km/h).
RIfth e transmission is in position k,the
trunk lid must be closed.
If th e elect
ric parking brake is released, the
F (USA) or !(CANADA) indicator lamp in
th e instrument clus ter goes out. Applying or
releasing the electric pa rking
brake manually
#To appl y:push handle 1.
The F (USA) or !(Canada) indicator
lamp appears in the instrument clus ter.
#To release: switch on the ignition.
16 4
Driving and pa rking

The HOLD function is deactivated inthefo llow‐
ing situations:
RWhen Active Dis tance Assist DISTRONIC is
acti vated.
RThe transmission is switched toposition j.
RWhentheve hicle is secured with the electric
parking brake.
In thefo llowing situations, theve hicle is held by
th e transmission position jorby the electric
parking brake:
RWhen the seat belt is unfas tened and the
driver's door is opened.
RWhen the engine is switched off.
RWhen there is a malfunction in the sy stem or
if th e po wer supply is insufficient.
DY NA MIC BODY CONT ROL
DYNA MIC BODY CONTROL has thefo llowing
ch aracteristics:
RVa riable damping characteristics
RContinual adjustment of the damping forc es
The damping characteristics adapt tothe cur rent
operating and driving situation.
The da mping is tuned individually for each wheel
and is af fected bythefo llowing factors:
RThe road sur face conditions
RVe hicle load
RThe drive program selected
The drive program can be adjus ted using the
DY NA MIC SELECT switch.
AIR BODY CONT ROL
AIR BODY CONT ROL function
AIR BODY CONTROL is an air suspension sy stem
with variable damping for impr oved driving com‐
fo rt. The all-round le vel control sy stem ensures
th e best possible suspension and const ant
ground clearance, even with a laden vehicle.
When driving at speed, theve hicle is lo wered
automatically toimpr ovedriving saf etyand to re
duce fuel consum ption. The option of manually
adjusting theve hicle le vel is also available.
AIR BODY CONTROL comprises:
RAir suspension with variable spring rate
RAu tomatic le vel control sy stem
RSpeed-dependent lo wering toreduce fuel
consum ption
RManual le vel adjustment
RADS PLUS (Adaptive Damping Sy stem with
const ant damping forc e adjustment)
RDY NA MIC SELECT switch and le vel button
Driving and parking 18
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