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
•After manual release, carefully press the cover onto the centre console while ensuring that the
electrical wires are positioned correctly.
Emergency programme
There is a fault in the system if all the displays on the instrument cluster for the selector lever
positions have a light background. The DSG dual clutch gearbox is running in an emergency
programme. The vehicle can still be driven in the emergency programme, but only at reduced
speed and not in all gears.
In vehicles with a DSG dual clutch gearbox, you may no longer be able to select reverse gear.
In all cases you should have the DSG dual clutch gearbox checked by a qualified workshop
immediately.
Overheating of the DSG dual clutch gearbox
The DSG dual clutch gearbox can become too hot, for example, if the vehicle pulls off
frequently, drives at crawling speed for long periods, or in stop-and-go traffic. Overheating is
indicated by the warning lamp and in some cases by a text message in the instrument cluster
display. A signal tone may also be given. Stop the vehicle and allow the gearbox to cool down ⇒
.
The vehicle does not move forwards or backwards even though a position
has been selected
If the vehicle will not move in the required direction, the system may have selected the position
incorrectly. Depress the brake pedal and reselect the position.
If the vehicle still does not move in the required direction, there is a system fault. Seek expert
assistance and have the system checked.
Downhill speed control
If the vehicle is being held on the Auto Hold function, the green indicator lamp lights up.
Switch off Auto Hold if necessary ⇒ Auto Hold function.
The Hill Descent Control system in vehicles with a DSG dual clutch gearbox helps when braking
and travelling downhill ⇒. This system uses the braking power of the engine, rather than the
brakes directly.
The DSG dual clutch gearbox selects the best gear for the circumstances, depending on the
steepness of the hill and the current speed. The selector lever must be in position D/S. The downhill
speed control is not active in Tiptronic mode.
As the downhill speed control system can shift down only as far as third gear, it may be necessary
to activate the Tiptronic mode when driving down particularly steep inclines. When in Tiptronic
mode, select second or first gear manually in order to make use of the braking effect of the engine
and to relieve the load on the brakes.
The start/stop system is automatically deactivated as long as downhill speed control is active.
Activating downhill speed control automatically:
•If the downhill gradient is greater than approximately 6yb .
•AND: if the selector lever is in position D/S.
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Never move the selector lever out of the position P if the electronic parking brake is not
switched on. Otherwise the vehicle could move unexpectedly if it is stopped on an incline,
which could lead to accidents and serious injuries.
WARNING
The DSG dual clutch gearbox will become damaged if the vehicle is allowed to roll for a
long period of time or at a high speed (for example while being towedyf Z L W K W K H V H O H F W R U
lever in position N and the engine switched off.
NOTICE
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•If the display indicates that the gearbox is overheating for the first time, the vehicle will
have to be parked safely or driven faster than 20 km/h (12 mphyf .
•If the text message and signal tone are repeated every ten seconds, the vehicle must be
parked safely immediately and the engine switched off. Allow the gearbox to cool down.
•In order to prevent damage to the gearbox, you should not drive on until the acoustic
warning stops. You should not pull away or drive the vehicle at very low speeds while
the gearbox is overheated.
NOTICE
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