Problems with the engine
ProblemPossible causes/consequences andMSolutions
The engine does not
start. The starter motor
can be heard.RThere is a malfunction in the engine electronics.
RThere is a malfunction in the fuel supply.
Before attempting to start the engine again:
XTurn the SmartKey back to position 0in the ignition lock.
or
XPress the Start/Stop button repeatedly until all indicator lamps in the instrument cluster go out.
XTry to start the engine again (Ypage 153). Avoid excessively
long and frequent attempts to start the engine as these will drain
the battery.
If the engine does not start after several attempts:
XConsult a qualified specialist workshop.
The engine does not
start. You cannot hear
the starter motor.The on-board voltage is too low because the battery is too weak or
discharged.
XJump-start the vehicle (Ypage 351).
If the engine does not start despite attempts to jump-start it:
XConsult a qualified specialist workshop.
The starter motor was exposed to a thermal load that was too high.
XTry to start the engine again.
If the engine still does not start:
XConsult a qualified specialist workshop.
The engine is not run-
ning smoothly and is
misfiring.There is a malfunction in the engine electronics or in a mechanical
component of the engine management system.
XOnly depress the accelerator pedal slightly.
Otherwise, non-combusted fuel may get into the catalytic con-
verter and damage it.
XHave the cause rectified immediately at a qualified specialist
workshop.
The coolant tempera-
ture gauge shows a
value above 248 ‡
(120 †).The coolant level is too low. The coolant is too hot and the engine
is no longer being cooled sufficiently.
XStop as soon as possible and allow the engine and the coolant to
cool down.
XCheck the coolant level (Ypage 328). Observe the warning
notes as you do so and add coolant if necessary.
158Driving
Driving and parking
continue to accelerate, the automatic
transmission automatically shifts up in
order to prevent engine damage.
Mercedes-AMG vehicles:the automatic
transmission will not shift up to the next
gear when the engine speed is very low.
XTo shift down: pull on the left-hand steer-
ing wheel paddle shifter (
Ypage 163).
The automatic transmission shifts down to the next gear.
If the engine exceeds the maximum engine
speed when shifting down, the automatic
transmission protects against engine dam- age by not shifting down.
Automatic down shifting occurs when
coasting.
Shift recommendation
The gearshift recommendations assist you in
adopting an economical driving style. The rec-
ommended gear is shown in the multifunction
display.
XShift to recommended gear ;according
to gearshift recommendation :when
shown in the multifunction display of the
instrument cluster.
Deactivating
If you have activated manual drive program
M , it will remain active for a certain amount of
time. Under certain conditions the minimum
amount of time is extended, e.g. in the case of
lateral acceleration, during an overrun phase
or when driving on steep terrain. If manual drive program
Mhas been deacti-
vated, the automatic transmission shifts into
the automatic drive program that was last
selected.
You can also deactivate manual drive pro-
gram Myourself:
XPull on the right-hand steering wheel pad-
dle shifter and hold it in place (
Ypage 163).
or
XUse the DIRECT SELECT lever to switch the
transmission position.
or
XUse the program selector button to change
the drive program (
Ypage 163).
Manual drive program Mis deactivated.
The automatic transmission switches to
the previously activated drive program E
(drive program Con Mercedes-AMG vehi-
cles) or S.
Manual drive program (Mercedes-
AMG vehicles)
General information
In this drive program, you can permanently
change gear yourself by using the steering
wheel paddle shifters. The transmission must be in position D.
Manual drive program Mis different from
drive program Swith regard to spontaneity,
responsiveness and smoothness of gear
changes.
As well as this permanent drive program M,
you can also activate temporary drive pro-
gram M(
Ypage 164).
Switching on the manual drive program
In manual drive program M, you can change
gear using the steering wheel paddle shifters
if the transmission is in position D. You can
see the currently selected drive program and
which gear is engaged in the multifunction
display.
Automatic transmission165
Driving and parking
Z
If you or others come into contact with fuel,
observe the following:
RWash away fuel from skin immediately
using soap and water.
RIf fuel comes into contact with your eyes,
immediately rinse them thoroughly with
clean water. Seek medical assistance with-
out delay.
RIf fuel is swallowed, seek medical assis-
tance without delay. Do not induce vomit-
ing.
RImmediately change out of clothing which
has come into contact with fuel.
GWARNING
Electrostatic buildup can create sparks and
ignite fuel vapors. There is a risk of fire and
explosion.
Always touch the vehicle body before opening
the fuel filler flap or touching the fuel pump
nozzle. Any existing electrostatic buildup is
thereby discharged.
Do not get into the vehicle again during the
refueling process. Otherwise, electrostatic
charge could build up again.
!Do not use diesel to refuel vehicles with a
gasoline engine. Do not switch on the igni-
tion if you accidentally refuel with the
wrong fuel. Otherwise, the fuel will enter
the fuel system. Even small amounts of the wrong fuel could result in damage to the
fuel system and the engine. Notify a quali-
fied specialist workshop and have the fuel
tank and fuel lines drained completely.
!Overfilling the fuel tank could damage the
fuel system.
!Take care not to spill any fuel on painted
surfaces. You could otherwise damage the
paintwork.
!Use a filter when refueling from a fuel can.
Otherwise, the fuel lines and/or injection
system could be blocked by particles from
the fuel can. If you overfill the fuel tank, fuel could spray
out when the fuel pump nozzle is removed.
For further information on fuel and fuel quality
(
Ypage 401).
Refueling
General information
Pay attention to the important safety notes
(
Ypage 167).
If you unlock/lock the vehicle from the out-
side, the fuel filler flap also unlocks/locks.
The position of the fuel filler cap is displayed
8 in the instrument cluster. The arrow
next to the filling pump indicates the side of
the vehicle.
Opening the fuel filler flap
:To open the fuel filler flap
;To insert the fuel filler cap
=Tire pressure table
?Instruction label for fuel type to be refu-
eled
XSwitch off the engine.
XOpen the driver's door.
The on-board electronics now have status
0. This is the same as the SmartKey having
been removed.
or, if the SmartKey is inserted in the ignition
lock:
XRemove the SmartKey from the ignition
lock.
168Refueling
Driving and parking
XPress the fuel filler flap in the direction of
arrow:.
The fuel filler flap swings up.
XTurn the fuel filler cap counterclockwise
and remove it.
XInsert the fuel filler cap into the holder on
the inside of fuel filler flap ;.
XCompletely insert the filler neck of the fuel
pump nozzle into the tank, hook in place
and refuel.
XOnly fill the tank until the pump nozzle
switches off.
iDo not add any more fuel after the pump
stops filling for the first time. Otherwise,
fuel may leak out.
Closing the fuel filler flap
XReplace the cap on the filler neck and turn
clockwise until it engages audibly.
XClose the fuel filler flap.
If you drive at speeds above 2 km/ hwith the
fuel filler flap open, the Fuel
fillerflap
openmessage is shown in the multifunction
display.
iClose the fuel filler flap before locking the
vehicle.
iIf you are driving with the fuel filler cap
open, the 8reserve fuel warning lamp
flashes. A message appears in the multi-
function display (
Ypage 271).
In addition, the ;Check Engine warning
lamp may light up (
Ypage 293).
For further information on warning and indi-
cator lamps in the instrument cluster, see
(
Ypage 293).
Refueling169
Driving and parking
Z
!Always secure the vehicle correctly
against rolling away. Otherwise, the vehicle
or its drivetrain could be damaged.
To ensure that the vehicle is secured against
rolling away unintentionally:
Rthe electric parking brake must be applied.
Rthe transmission must be in position Pand
the SmartKey must be removed from the
ignition lock.
Rthe front wheels must be turned towards
the curb on steep uphill or downhill gradi-
ents.
Rthe empty vehicle must be secured at the
front axle with a wheel chock or similar, for example, on uphill or downhill gradients.
Ra laden vehicle must also be secured at the
rear axle with a wheel chock or similar, for
example, on uphill or downhill gradients.
Switching off the engine
Important safety notes
GWARNING
The automatic transmission switches to neu-
tral position Nwhen you switch off the engine.
The vehicle may roll away. There is a risk of an
accident.
After switching off the engine, always switch
to parking position P. Prevent the parked vehi-
cle from rolling away by applying the parking
brake.
Further information if the engine cannot be
switched off as described here (
Ypage 359).
Using the SmartKey
XApply the electric parking brake.
XShift the transmission to position P.
XTurn the SmartKey to position0in the igni-
tion lock and remove it.
The immobilizer is activated. If you switch the engine off with the trans-
mission in position
Ror D, the automatic
transmission shifts to Nautomatically.
If you then open the driver's door or the
front-passenger door or remove the Smart-
Key from the ignition, the automatic trans-
mission shifts to Pautomatically.
If you want the automatic transmission to
remain in neutral N, e.g. when having the
vehicle cleaned in an automatic car wash with
a towing system:
XSwitch on the ignition.
XDepress the brake pedal and keep it
depressed.
XShift to neutral N.
XRelease the brake pedal.
XRelease the electric parking brake.
XSwitch off the ignition and leave the Smart-
Key in the ignition lock.
Using the Start/Stop button
XApply the electric parking brake.
XShift the transmission to position P.
XPress the Start/Stop button (Ypage 151)
The engine stops and all the indicator
lamps in the instrument cluster go out.
When the driver's door is closed, this cor-
responds to key position 1. When the driv-
er's door is open, this corresponds to key
position 0: "Key removed".
If you switch the engine off with the trans-
mission in position Ror D, the automatic
transmission shifts to Nautomatically.
If you then open the driver's or front-
passenger door, the automatic transmission
shifts to Pautomatically.
If you want the automatic transmission to
remain in neutral N, e.g. when having the
vehicle cleaned in an automatic car wash with
a towing system:
XSwitch on the ignition.
XDepress the brake pedal and keep it
depressed.
Parking171
Driving and parking
Z
For more dynamic changes, carry out a man-
ual reset.
For further information on the ECO display,
see (
Ypage 236).
Braking
Important safety notes
GWARNING
If you shift down on a slippery road surface in an attempt to increase the engine's braking
effect, the drive wheels could lose their grip.
There is an increased danger of skidding and
accidents.
Do not shift down for additional engine brak-
ing on a slippery road surface.
Downhill gradients
!On long and steep gradients, you must
reduce the load on the brakes by shifting
early to a lower gear. This allows you to take
advantage of the engine braking effect and
helps avoid overheating and excessive
wear of the brakes.
When you take advantage of the engine
braking effect, a drive wheel may not turn
for some time, e.g. on a slippery road sur-
face. This could cause damage to the drive
train. This type of damage is not covered by
the Mercedes-Benz warranty.
Heavy and light loads
GWARNING
If you rest your foot on the brake pedal while
driving, the braking system can overheat. This increases the stopping distance and can even
cause the braking system to fail. There is a
risk of an accident.
Never use the brake pedal as a footrest. Never
depress the brake pedal and the accelerator
pedal at the same time.
!Depressing the brake pedal constantly
results in excessive and premature wear to
the brake pads.
If the brakes have been subjected to a heavy
load, do not stop the vehicle immediately.
Drive on for a short while. This allows the air-
flow to cool the brakes more quickly.
Wet roads
If you have driven for a long time in heavy rain
without braking, there may be a delayed reac-
tion from the brakes when braking for the first
time. This may also occur after the vehicle has
been washed or driven through deep water.
You have to depress the brake pedal more
firmly. Maintain a greater distance from the
vehicle in front.
After driving on a wet road or having the vehi-
cle washed, brake firmly while paying atten-
tion to the traffic conditions. This will warm up
the brake discs, thereby drying them more
quickly and protecting them against corro-
sion.
Limited braking performance on salt-
treated roads
If you drive on salted roads, a layer of salt
residue may form on the brake discs and
brake pads. This can result in a significantly
longer braking distance.
RIn order to prevent any salt build-up, apply
the brakes occasionally while paying atten-
tion to the traffic conditions.
RCarefully depress the brake pedal and the
beginning and end of a journey.
RMaintain a greater distance to the vehicle
ahead.
Servicing the brakes
!If the red brake warning lamp lights up in
the instrument cluster and you hear a warn-
ing tone while the engine is running, the
brake fluid level may be too low. Observe
176Driving tips
Driving and parking
:Sensors in the front bumper, left-hand
side (example)
The sensors must be free from dirt, ice or
slush. They can otherwise not function cor-
rectly. Clean the sensors regularly, taking
care not to scratch or damage them
(
Ypage 335).
Front sensors
CenterApprox. 40 in (approx.
100 cm)
CornersApprox. 24 in (approx.
60 cm)
Rear sensors
CenterApprox. 48 in (approx.
120 cm)
CornersApprox. 32 in (approx.
80 cm)
Minimum distance
CenterApprox. 8 in (approx.
20 cm)
CornersApprox. 6 in (approx.
15 cm)
If there is an obstacle within this range, the
relevant warning displays light up and a warn-
ing tone sounds. If the distance falls below
the minimum, the distance may no longer be
shown.
Warning displays
:Segments on the left-hand side of the
vehicle
;Segments on the right-hand side of the
vehicle
=Segments showing operational readiness
The warning displays show the distance
between the sensors and the obstacle. The
warning display for the front area is in the
instrument cluster. The warning display for
the rear area is located on the headliner in the
rear compartment.
The warning display for each side of the vehi- cle is divided into five yellow and two red seg-
ments. PARKTRONIC is operational if opera-
tional readiness indicator =lights up.
The selected transmission position and the
direction in which the vehicle is rolling deter-
200Driving systems
Driving and parking
:Detected parking space on the left
;Parking symbol
=Detected parking space on the right
Active Parking Assist is switched on automat-
ically when driving forwards. The system is
operational at speeds of up to approximately
22 mph (35 km/h). While in operation, the
system independently locates and measures
parking spaces on both sides of the vehicle.
Active Parking Assist will only detect parking
spaces:
Rparallel or at right angles to the direction of
travel
Rthat are parallel to the direction of travel
and at least 59 in (1.5 m) wide
Rthat are parallel to the direction of travel
and at least 39.5 in (1.0 m) longer than your
vehicle
Rthat are at right angles to the direction of
travel and at least 39.5 in (1.0 m) wider
than your vehicle
iNote that Active Parking Assist cannot
measure the size of a parking space if it is at
right angles to the direction of travel. You
will need to judge whether your vehicle will
fit into the parking space.
When driving at speeds below 19 mph
(30 km/h), you will see the parking symbol as
a status indicator in the instrument cluster.
When a parking space h
as been detected, an
arrow towards the right or the left also
appears. By default, Active Parking Assist
only displays parking spaces on the front-
passenger side. Parking spaces on the driv- er's side are displayed as soon as the turn
signal on the driver's side is activated. When
parking on the driver's side, this must remain
switched on until you acknowledge the use of
Active Parking Assist by pressing the
a
button on the multifunction steering wheel.
The system automatically determines
whether the parking space is parallel or at
right angles to the direction of travel.
A parking space is displayed while you are
driving past it, and until you are approx-
imately 50 ft (15 m) awayfrom it .
Parking
GWARNING
If you leave the vehicle when it is only being
braked by Active Parking Assist it could roll
away if:
Rthere is a malfunction in the system or in
the voltage supply.
Rthe electrical system in the engine com-
partment, the battery or the fuses have
been tampered with.
Rthe battery is disconnected.
Rthe accelerator pedal has been depressed,
e.g. by a vehicle occupant.
There is a risk of an accident.
Before leaving the vehicle, always secure it
against rolling away.
iWhen PARKTRONIC detects obstacles,
Active Parking Assist brakes automatically
during the parking process. You are respon-
sible for braking in good time.
XStop the vehicle when the parking space
symbol shows the desired parking space in
the instrument cluster.
XShift the transmission to position R.
The Start Park Assist? Yes: OK No:
% message appears in the multifunction
display.
204Driving system s
Driving an d parking