Mercedes-Benz B-Class Quiz
On-board computer and displays

Engine

In this manual: On-board computer and displays
Introduction — 16At a glance — 11Safety — 27Opening and closing — 33Seats, steering wheel and mirrors — 21Lighting and windshield wipers — 25Air conditioning — 27Driving and parking — 66On-board computer and displays — 35Storage and other — 21Maintenance and care — 10Flat tire assistance — 26Wheels and tires — 26Technical data — 22
~3min read






Displaying messages Possible causes/consequences and solutions
refroid. cf.Top up coolant
see

Owner's Manual

 The coolant level is too low. Avoid long trips if the coolant level in the engine cooling system is too low. Otherwise, you will damage the engine.
  • Top up coolant, observing the warnings.
  • If you need to top up coolant frequently, have the engine cooling system checked by a qualified workshop.
Le moteur du ventilateur est défectueux.The fan motor is faulty.
  • If the coolant temperature is below 120jusqu'à l'atelier qualifié le plus proche., continue driving
    to the nearest qualified workshop.
  • In this case, avoid high engine loads (mountain driving, for example) and driving in heavy traffic.
Couper moteurCoolant temp. Stop
Switch off engine		 The coolant is too hot.

In addition, a warning tone sounds.

WARNING

Do not drive when the engine has overheated. Fluids that have spilled into the engine compartment due to leaks or improper handling could ignite.

In addition, steam escaping from an overheated engine can cause severe burns, even when simply opening the hood.

Risk of injury.

  • Stop immediately, taking traffic conditions into account, and switch off the engine.
  • Apply the electric parking brake.
  • Leave the vehicle and keep away until the engine has cooled down.
  • Make sure the air intake to the engine radiator is not blocked (by frozen snow, for example).
  • Wait until the message has disappeared and the coolant temperature is below 120 °C before restarting the
    engine. Otherwise, the engine may be damaged.moteur. Sinon, le moteur risque d'être endommagé.before restarting the
    engine. Otherwise, the engine may be damaged.
  • Monitor the coolant temperature gauge.
  • If the temperature rises again, drive immediately to a qualified workshop.

Under normal driving conditions and with the correct coolant mixture, the displayed temperature can reach 120 °C..
La batterie ne se charge plus.Causes possibles :The battery is no longer charging.

Possible causes:

  • The alternator is faulty.
  • The serpentine belt is broken.
  • The electronic system has a fault.
  • Stop immediately, taking traffic conditions into account, and switch off the engine.
  • Open the hood.
  • Perform a visual inspection of the serpentine belt to check whether it is broken.

If the serpentine belt is broken:

Do not continue driving! Otherwise, the engine may overheat.

  • Contact a qualified workshop.

If the serpentine belt is in good condition:

  • Go to a qualified workshop immediately.
contrôler niveau huile moteurAt the filling station:
check engine oil level		 The oil level has dropped to the minimum value.

In addition, a warning tone sounds.

  • Check the oil level at the latest at the next refueling.
  • Top up if necessary.
  • If you need to top up engine oil frequently, have the engine checked by a qualified workshop.
Le niveau de carburant a atteint le niveau de réserve.Fuel reserveThe fuel level has reached the reserve level.
  • Refuel at the next filling station.
Il ne reste presque plus de carburant dans le réservoir.There is almost no fuel left in the tank.
  • You must refuel at the next filling station.
Véhicules équipés d'un moteur diesel : le filtre à air du moteur estReplace air filterVehicles with diesel engine: the engine air filter is dirty and must be replaced.
  • Visit a qualified workshop.
Véhicules équipés d'un moteur diesel : il y a de l'eau dans le filtreDrain fuel filterVehicles with diesel engine: there is water in the fuel filter.

The water must be drained.

  • Visit a qualified workshop.

Test yourself

A quick Mercedes-Benz B-Class quiz: every answer comes with an explanation and a link to the manual page.