Mercedes-Benz C-Class Manuals

Mercedes-Benz C-Class Owners Manual: Safety systems

Warning/indicator lamp

Possible causes/consequences and ► Solutions

Brake warning lamp (USA)

Brakes warning lamp (Canada)

The red brake system warning lamp is lit while the engine is running.

Possible causes are:

  • The brake force boosting is malfunctioning and the braking characteristics may be affected.
  • There is insufficient brake fluid in the brake fluid reservoir.
WARNING Risk of accident and injury if brake force boosting is malfunctioning
If brake force boosting is malfunctioning, increased brake pedal force may be necessary for braking. The braking characteristics may be impaired. The braking distance can increase in emergency braking situations.
  • Stop in a safe location immediately. Do not continue driving.
  • Consult a qualified specialist workshop.

 

WARNING Risk of an accident due to low brake fluid level
If the brake fluid level is too low, the braking effect and the braking characteristics may be impaired.
  • Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
  • Consult a qualified specialist workshop.
  • Do not add brake fluid.
  • Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.
  • Observe the messages on the multifunction display.
  • Consult a qualified specialist workshop.

ABS warning lamp

The yellow ABS warning lamp is lit while the engine is running.

ABS is malfunctioning.

If there is an additional warning tone, EBD is malfunctioning.

Other driving systems and driving safety systems may also malfunction.

WARNING There is risk of skidding if EBD or ABS is malfunctioning
If EBD or ABS is malfunctioning, the wheels could lock when braking

The steering capability and braking characteristics are thus severely impaired. The braking distance in an emergency braking situation can increase. In addition, other driving safety systems are switched off.

  • Drive on carefully.
  • Have the brake system checked immediately at a qualified specialist workshop.

  • Drive on carefully.
  • Observe the messages on the multifunction display.
  • Visit a qualified specialist workshop.

Red indicator lamp, electric parking brake applied (USA only)

Red indicator lamp, electric parking brake applied (Canada only)

Yellow electric parking brake indicator lamp is malfunctioning

The red electric parking brake indicator lamp flashes or is lit. The yellow indicator lamp is also lit if the electric parking brake malfunctions.
  • Observe the messages on the multifunction display.

ESP warning lamp flashes

The yellow ESP warning lamp flashes while the vehicle is in motion.

At least one wheel and tire assembly has reached its traction limit.

  • Adapt your driving style to suit the road and weather conditions.

ESP warning lamp lights up

The yellow ESP warning lamp is lit while the engine is running.

ESP is malfunctioning Other driving systems and driving safety systems may also malfunction.

WARNING Risk of skidding if ESP is malfunctioning
If ESP is malfunctioning, ESP cannot carry out vehicle stabilization. In addition, other driving safety systems are switched off.
  • Drive on carefully.
  • Have ESP checked at a qualified specialist workshop.

  • Drive on carefully.
  • Observe the messages on the multifunction display.
  • Visit a qualified specialist workshop.

ESP OFF warning lamp

The yellow ESP OFF warning lamp is lit while the engine is running.

ESP is deactivated.

WARNING Risk of skidding when driving with ESP deactivated
If ESP is deactivated, ESP cannot carry out vehicle stabilization. The availability of further driving safety systems is also limited.
  • Drive on carefully.
  • Only deactivate ESP for as long as the situation requires.

If ESP cannot be activated, ESP is malfunctioning.

  • Have ESP checked immediately at a qualified specialist workshop.

  • Observe the notes on deactivating ESP

Restraint system warning lamp

The red restraint system warning lamp is lit while the engine is running.

The restraint system is faulty.

WARNING Risk of injury or fatal injury due to a malfunction in the restraint system
If the restraint system is malfunctioning, restraint system components may be triggered unintentionally or might not be triggered at all in the event of an accident. This may affect the Emergency Tensioning Device or airbag, for example.
  • Have the restraint system checked and repaired immediately at a qualified specialist workshop.

  • Drive on carefully.
  • Observe the messages on the multifunction display.
  • Visit a qualified specialist workshop immediately.

Seat belts

Warning/indicator lamp

Possible causes/consequences and ► Solutions

Seat belt warning lamp lights up

The red seat belt warning lamp will light up for six seconds once the engine has started.

In addition, a warning tone may sound.

The seat belt warning lamp reminds the driver and front passenger to fasten their seat belts.

  • Fasten your seat belt.

If you have placed objects on the front passenger seat, the seat belt warning lamp may remain lit.

Seat belt warning lamp flashes

The red seat belt warning lamp flashes and an intermittent warning tone sounds.

The driver or front passenger has not fastened their seat belt while the vehicle is in motion.

  • Fasten your seat belt.

There are objects on the front passenger seat.

  • Remove the objects from the front passenger seat.

Driving systems

Warning/indicator lamp

Possible causes/consequences and ► Solutions

Suspension warning lamp

The yellow AIRMATIC warning lamp is on.

The yellow DYNAMIC BODY CONTROL warning lamp is on.

There is a malfunction with AIRMATIC.

There is a malfunction in the DYNAMIC BODY CONTROL.

  • Observe the messages on the multifunction display.

Warning lamp for distance warning function

The red distance warning lamp lights up while the vehicle is in motion.

The distance to the vehicle in front is too small for the speed selected.

If there is an additional warning tone, you are approaching an obstacle at too high a speed.

  • Be prepared to brake immediately.
  • Increase the distance.

Function of Active Brake Assist .

    Overview of warning and indicator lamps

    Engine

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