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Pull-away assist systems

This chapter contains information on the following subjects:

First read and observe the introductory information and safety warnings .

Lit upPossible causeSolution
The start/stop system is not available. Automatic engine switch-off is active.Take your foot off the brake to start the engine again ⇒ Start/stop system.

Automatic engine switch-off is not possible. OR: automatic engine start is not possible. OR:

the engine was started automatically.

Check whether all technical requirements have been fulfilled. If not, remedy any shortfalls ⇒ Start/stop system.
The engine is starting.

Several warning and indicator lamps will light up briefly as a functional check when the ignition is switched on. They will switch off after a few seconds.

Fig. 121 In the upper part of the centre console: button for the start/stop system

Fig. 121 In the upper part of the centre console: button for the start/stop system

First read and observe the introductory information and safety warnings .

If the start/stop system is activated, the engine will be switched off automatically when the vehicle is stationary. When required, the engine restarts automatically.

The function is automatically activated every time the ignition is switched on. The instrument cluster display will show information about the current status.

Always switch off the start/stop system manually when driving through water.

  • When the vehicle is stationary, disengage the gear and release the clutch pedal. The engine is stopped.
  • Depress the clutch pedal to restart the engine.
  • When the vehicle is stationary, press and hold the brake pedal. The engine is stopped.
  • To restart the engine, remove your foot from the brake pedal or depress the accelerator in selector lever position P.

Important preconditions for automatic engine switch-off

Section titled “Important preconditions for automatic engine switch-off”
  • The driver is wearing their seat belt.
  • The driver door is closed.
  • The bonnet is closed.
  • The factory-fitted towing bracket is not attached electrically to a trailer.
  • A minimum engine temperature has been reached.
  • The vehicle has been moved since the engine was last switched off.
  • For vehicles with Climatronic: the temperature inside the vehicle is within the pre-set temperature range.
  • For vehicles with Climatronic: neither a very high nor a very low temperature has been set.
  • The defrost function of the air conditioning system is not switched on.
  • For vehicles with Climatronic: a high blower level has not been selected manually.
  • The charging state of the vehicle battery is sufficient.
  • The temperature of the vehicle battery is not too low or too high.
  • The vehicle is not on a steep incline.
  • The front wheels are not turned greatly.
  • Reverse gear is not engaged.

The engine can start automatically under the following conditions:

  • If the temperature inside the vehicle substantially increases or decreases.
  • If the vehicle rolls on.
  • If the voltage of the vehicle battery falls.

Conditions that make a key start necessary

Section titled “Conditions that make a key start necessary”

The engine has to be started manually with the vehicle key in the following conditions:

  • If the driver unfastens their seat belt.
  • If the driver door is opened.
  • If the bonnet is opened.

Switching the start/stop system on and off manually

Section titled “Switching the start/stop system on and off manually”
  • Press the button in the centre console ⇒ fig. 121.
  • If start/stop system has been deactivated, the indicator lamp in the button lights up.

If the start/stop system has switched the engine off, the engine will start again as soon as the system has been switched off manually with the button.

In some cases, it will be necessary to restart the engine manually with the vehicle key. Follow any corresponding messages on the instrument cluster display.

First read and observe the introductory information and safety warnings .

The Hill Hold Assist function actively holds the vehicle when pulling away on an incline.

The Hill Hold Assist function is automatically activated if the following conditions are met

Section titled “The Hill Hold Assist function is automatically activated if the following conditions are met”

Conditions 1 to 3 must be met at the same time:

Manual gearboxAutomatic gearbox
1On an incline, the stationary vehicle must be held in position with the footbrake until the vehicle starts moving.
2The engine is running smoothly.
3Fully depress the clutch pedal and move the gear stick to the first gear position if you want to drive forwards up a hill or to the R position if you want to reverse up a hill.The driving mode R, D or S has been selected.
In order to start moving, remove your foot from the brake pedal, then release the clutch pedal (clutch engages) and press the accelerator simultaneously. The brake will gradually be released as the clutch is engaged.To start moving, remove your foot from the brake pedal and press the accelerator immediately. The brake will gradually be released as the vehicle pulls away.

The Hill Hold Assist function will be deactivated immediately

Section titled “The Hill Hold Assist function will be deactivated immediately”
  • As soon as one of the conditions indicated above is not fulfilled.
  • If the engine is not running smoothly or there is an engine fault.
  • If the engine is switched off or has stalled.
  • Vehicles with automatic gearbox: if the selector lever is in the neutral position N.