Mercedes-Benz GLK-Class: Problems with the engine - Driving - Driving and parking - Mercedes-Benz GLK-Class Owner's ManualMercedes-Benz GLK-Class: Problems with the engine

Problem

The engine does not start. The starter motor can be heard.

Possible causes/consequences and Solutions

  • There is a malfunction in the engine electronics.
  • There is a malfunction in the fuel supply.
  • Before attempting to start the engine again, turn the SmartKey in the ignition back to position 0 or press the Start/Stop button repeatedly until all indicator lamps in the instrument cluster go out.
  • Try to start the engine again (). 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:

  • Consult a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.

Problem

The engine does not start. You cannot hear the starter motor.

Possible causes/consequences and Solutions

The on-board voltage is too low because the battery is too weak or discharged.

  • Jump-start the vehicle ().

If the engine does not start despite attempts to jump-start it:

  • Consult a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.

The starter motor was exposed to a thermal load that was too high.

  • Allow the starter motor to cool down for approximately two minutes.
  • Try to start the engine again.

If the engine still does not start:

  • Consult a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center.

Problem

The engine is not running smoothly and is misfiring.

Possible causes/consequences and Solutions

There is a malfunction in the engine electronics or a mechanical component of the engine management system.

  • Only depress the accelerator pedal slightly.
  • Have the cause rectified immediately at a qualified specialist workshop, e.g. an authorized Mercedes-Benz Center. Otherwise, non-combusted fuel may get into the catalytic converter and damage it.

Problem

The coolant temperature gauge shows a value above 248 ‡ (120 †).

Possible causes/consequences and Solutions

The coolant level is too low. The coolant is too hot and the engine is no longer being cooled sufficiently.

  • Stop as soon as possible and allow the engine and the coolant to cool down.
  • Check the coolant level (). Observe the warning notes as you do so and add coolant if necessary.
    Hill start assist
    Hill start assist helps you when pulling away forwards or in reverse on an uphill gradient. It holds the vehicle for a short time after you have removed your foot from the brake pedal. This gives ...

    See also:

    Displaying navigation instructions
    In the Navi menu, the multifunction display shows navigation instructions. For more information, see the separate operating instructions. Switch on COMAND (see the separate operating instruction ...

    Onboard Refueling Vapor Recovery
    The onboard refueling vapor recovery (ORVR) system captures the fuel vapors during refueling. The vapors are adsorbed in a canister filled with activated carbon. While driving, the fuel vapo ...

    Precautions on child restraints
    - Failure to follow the warnings and instructions for proper use and installation of child restraints could result in serious injury or death of a child or other passengers in a sudden sto ...