First read and observe the introductoryinformation and safety warnings⇒
Introduction
Warning and indicator lamps in the instrument cluster
Warning and indicator lamps light up
Fault in engine management system. The engine should be checked by a qualified workshop
as soon as possible.Risk of engine overheating. The engine speed will be automatically
restricted. The engine speed is shown on the instrument cluster display. The engine speed control
is lifted when the engine is no longer in a critical temperature range and the foot is taken off the
accelerator. and Engine speed limitation is initiated due to a fault in the engine
management system. Make sure that you do not exceed the displayed engine speed. The engine
should be checked by a qualified workshop as soon as possible.Exhaust system fault. Have
the engine checked by a qualified workshop.Particulate filter has become saturated with
soot. Drive in fourth gear (manual gearboxyf R U L Q V H O H F W R U O H Y H U S R V L W L R Q D (DSG dual clutch
gearboxyf D W D V S H H G R I D W O H D V W N P K P S K \f for approximately 15 minutes. Observe the valid
speed limits. Go to the nearest qualified workshop if the indicator lamp still does not go out.
m/k/a997MKVehicles with diesel engine
Indicator lamps flash.
Fault in engine management system. The engine should be checked by a qualified workshop
as soon as possible.Engine management system has detected misfiring, which damages the
catalytic converter. Reduce speed immediately and drive carefully to the nearest qualified
workshop. Have the engine checked.
Unauthorised vehicle keys
If a non-authorised vehicle key has been inserted in the ignition lock it can be removed as follows:
•m/k/a995MKVehicles with a DSG dual clutch gearbox: press the lock button in the
selector lever and release. Pull the vehicle key out of the ignition lock.
•m/k/a995MKVehicles with a manual gearbox: remove the vehicle key from the ignition
lock.
Emergency start function
Use the emergency start function if no valid vehicle key is detected in the vehicle interior. A
corresponding display will appear in the instrument cluster. This could be the case, for example, if
the button cell in the vehicle key is weak or discharged:
•Depress and hold the brake pedal.
•Hold the vehicle key to the right of the steering column trim directly after pressing the starter
button ⇒ Fig. 120.
•The ignition is switched on automatically, and in some cases the engine is started.
Emergency deactivation
If the engine cannot be switched off by pressing the starter button briefly, an emergency switch-off
procedure is required:
•Press the starter button twice within a few seconds or press and hold once.
•The engine switches off automatically ⇒.
Immobiliser malfunction
A message will be displayed in the instrument cluster if an unauthorised vehicle key is used or there
is a fault in the system. The engine cannot be started. Use an authorised vehicle key or seek expert
assistance.
Start/stop system
Fig. 121 In the lower part of the centre console: button for the start/stop system.
The start/stop system automatically switches the engine off when the vehicle is coming to a stop
and when stationary. When required, the engine restarts automatically.
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Conditions that require a manual engine start
The engine must be started manually under the following conditions:
•If the driver door is opened.
•If the bonnet is opened.
Activating and deactivating the start/stop system manually
•Press the button in the centre console ⇒ Fig. 121 to deactivate the system. If the
start/stop system has been deactivated, the indicator lamp in the button lights up.
•Press the button in the centre console again ⇒ Fig. 121 to reactivate the system.
The instrument cluster shows the status of the start/stop system every time the button is
pressed.
If the start/stop system has switched the engine off, it will start again as soon as the system has
been deactivated manually with the button.
Always deactivate the start/stop system manually when driving through water.
Start/stop mode when Adaptive Cruise Control (ACCyf L V D F W L Y e
The engine will be switched off after the Adaptive Cruise Control (ACCyf K D V E U R X J K W W K H Y H K L F O H W R D
standstill via an active braking intervention ⇒ Adaptive Cruise Control (ACCyf.
m/k/a995MKVehicles with DSG dual clutch gearbox: when the Adaptive Cruise Control
(ACCyf L V D F W L Y H W K H ' 6 G dual clutch gearbox can shift into coasting mode and the engine can be
switched off with the engine-off coasting function.
In the following instances, the engine will restart when the Adaptive Cruise Control (ACCyf L V D F W L Y H :
•If the accelerator is depressed.
•When the Adaptive Cruise Control (ACCyf K D V U H V X P H G V S H H G D Q G D X W R P D W L F G L V W D Q F H F R Q W U R O .
•If the vehicle ahead has moved on.
•If the Adaptive Cruise Control (ACCyf L V G H D F W L Y D W H G D Q G W K H Y H K L F O H G U L Y L Q J L Q I U R Q W P R Y H G D Z D \ .
Troubleshooting
The engine stop function may be deactivated if the temperature is above around 38°C (100°Fyf .
In some cases, it may be necessary to restart the engine manually. Follow any
corresponding messages on the instrument cluster display.
The start/stop function is activated automatically if the Eco driving profile is selected on
vehicles with driving profile selection ⇒ Driving profile selection and 4MOTION Active Control.
Always deactivate the start/stop system manually when driving through water.
Manual gearbox: selecting a gear
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Never switch off the engine or the ignition while the vehicle is in motion. This can lead to a
loss of vehicle control, accidents and serious injuries.
•The airbags and belt tensioners will not work if the ignition is switched off.
•The brake servo will not work when the engine is switched off. That is why more
pressure on the brake pedal is needed to brake the vehicle when the engine is
switched off.
•The power steering will not work when the engine is not running. More power is
needed to steer the vehicle when the engine is switched off.
•When the ignition is switched off, the steering lock may activate and you will no longer
be able to steer the vehicle.
•The start/stop system must be deactivated if work is to be carried out in the engine
compartment.
WARNING
If the start/stop system is used in very high outside temperatures over a long period, the
12-volt vehicle battery can be damaged.
NOTICE
•Gently push the selector lever forwards ⊕ or back ㊀ to shift gear up or down ⇒ Fig. 124.
When moving the selector lever in the Tiptronic gate, do not press the lock button on the selector
lever.
Operating Tiptronic with the paddles
•Pull the right paddle ⇒ Fig. 125 towards the steering wheel to change up a gear.
•Pull the left paddle towards the steering wheel to change down a gear.
•To leave Tiptronic mode, pull the right paddle towards the steering wheel for approximately one
second.
Tiptronic is automatically deactivated if the selector paddles are not operated for some time and the
selector lever is not in the Tiptronic gate.
Driving with DSG dual clutch gearbox
The gearbox changes the forward gears up and down automatically.
Driving down hills
The steeper the gradient, the lower the gear you will need. Lower gears increase the braking effect
of the engine. Never allow the vehicle to roll down mountains or hills in the neutral position N.
•Reduce your speed.
•Push the selector lever from position D/S to the right into the Tiptronic gate ⇒ Changing gear
using Tiptronic.
•Gently push the selector lever to the rear to change down gear.
•OR: shift down using the paddles on the steering wheel ⇒ Changing gear using Tiptronic.
Stopping and pulling away on an uphill gradient
The steeper the uphill gradient, the lower the gear you will need.
If you wish to stop the vehicle or pull away when driving uphill you should use the Auto Hold
function ⇒ Electronic parking brake.
When you stop the vehicle on an incline and the vehicle remains in gear, the vehicle must always
be prevented from rolling by depressing the brake pedal or by applying the electronic parking brake.
The brake pedal or the electronic parking brake should not be released until you pull away ⇒.
Coasting with DSG dual clutch gearbox
In coasting mode, the momentum of the vehicle can be used to save fuel in conjunction with a
foresighted driving style. With the engine-off coasting function, the engine is not just disengaged,
but is also switched off. The engine no longer brakes the vehicle – the vehicle can roll for a longer
distance. The function is available only in the selector lever position D/S and at speeds of
approximately 30 – 130 km/h (18 mph – 80 mphyf .
An automatic engine start may take place in order to ensure reliable engine restarting and to
guarantee the power supply of the vehicle electrical system.
Triggering coasting
•Select the Eco driving profile from the driving profile selection menu ⇒ Driving profile selection
and 4MOTION Active Control.
•Remove your foot from accelerator pedal. The engine is disengaged and runs in coasting mode.
The vehicle rolls without the braking effect of the engine. The engine is automatically switched
off on vehicles with engine-off coasting function.
Cancelling coasting mode
•Depress the brake pedal briefly.
•OR: depress the accelerator or brake pedal briefly.
•OR: pull a paddle towards the steering wheel.
•OR: press the selector lever to the Tiptronic position.
Kickdown
The kick down function enables maximum acceleration in the selector lever position D/S or in the
Tiptronic position.
•When accelerating, the gearbox automatically shifts up to the next gear shortly before
the maximum permitted engine speed is reached.
•When shifting down a gear manually, the gearbox will not change gear until the engine
can no longer be overrevved.
NOTICE
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