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

Lighting

In this manual: On-board computer and displays
Introduction — 5At a glance — 6Safety — 25Opening and Closing — 17Seats, steering wheel and mirrors — 12Lights and windshield wipers — 11Climate Control — 11Driving and parking — 44On-board computer and displays — 29Stowing and Useful Information. Good to Know — 1Stowing and Useful Information. Storage Options — 10Stowage and convenience features. Convenience features — 7Maintenance and care — 11Roadside assistance — 13Wheels and tires — 13Technical data — 13
~4min read

The lighting systems of the Mercedes E-Class (4th gen, W212, 2009–2016) combine state-of-the-art LED technology with versatile safety functions. This section gives an overview of possible faults and their significance for vehicle safety. Drivers learn how to respond to warning messages in order to ensure optimal visibility and conspicuity in road traffic.

Info
Vehicles with LED light sources in the light units:

The display message for the corresponding light is only shown when all LEDs are defective.

Display messages Possible causes/consequences and solutions
Cornering light left or cornering light right

The left or right cornering light is defective.

Consult a qualified specialist workshop.
Low beam left or low beam right

The left or right low beam is defective.

Consult a qualified specialist workshop.
Trailer tail light left or trailer tail light right

The left or right trailer tail light is defective.

Observe the manufacturer's operating instructions.
Trailer turn signal left or trailer turn signal right The left or right trailer turn signal is defective.

Observe the manufacturer's operating instructions.
Trailer brake light The trailer brake light is defective.

Observe the manufacturer's operating instructions.
Rear turn signal left or rear turn signal right

The left or right rear turn signal is defective.

Consult a qualified specialist workshop.
Front turn signal left or front turn signal right The left or right front turn signal is defective.

Check whether the bulb may be replaced.

or

Consult a qualified specialist workshop.
Mirror turn signal left or mirror turn signal right The turn signal in the left or right exterior mirror is defective.

Consult a qualified specialist workshop.
3rd brake light

The third brake light is defective.

Consult a qualified specialist workshop.
Brake/tail light left or brake/tail light right

The left or right brake/tail light is defective.

Consult a qualified specialist workshop.
High beam left or high beam right

The left or right high beam is defective.

Check whether the bulb may be replaced.

or

Consult a qualified specialist workshop.
License plate light left or license plate light right

The left or right license plate light is defective.

Consult a qualified specialist workshop.
Rear Fog Lamp

The rear fog light is defective.

Consult a qualified specialist workshop.
Front position light left or front position light right

The left or right front position or parking light is defective.

Consult a qualified specialist workshop.
Reversing light left or reversing light right

The left or right reversing light is defective.

Consult a qualified specialist workshop.
Rear side marker light left or rear side marker light right

The left or right rear side marker light is defective.

Consult a qualified specialist workshop.
Daytime running light left or daytime running light right

The left or right daytime running light is defective.

Consult a qualified specialist workshop.
Intelligent Light System not functioning

The Intelligent Light System is defective. The lighting system without the Intelligent Light System remains available.

Consult a qualified specialist workshop.
Fault, see operator's manual The exterior lighting has a fault.

Consult a qualified specialist workshop.

Vehicles with towing device: a fuse may have blown.

Stop safely.

Secure the vehicle against rolling away.

Check the fuses.

If necessary, replace the blown fuse. Observe the warnings.

If the display message continues to be shown:

Consult a qualified specialist workshop.
AUTO light not functioning

The light sensor is defective.

Consult a qualified specialist workshop.
Switch off lights When leaving the vehicle, the lights are switched on. In addition, a warning tone sounds.

Turn the light switch toturn.
Adaptive High Beam Assist Plus currently not available, see operator's manual

The Adaptive High Beam Assist Plus is switched off and temporarily not ready for operation. Possible causes:

  • The windshield in the camera's field of view is dirty.
  • Visibility is impaired by heavy precipitation or fog.
Clean the windshield.

When the system detects full camera availability, the display message Adaptive High Beam Assist Plus available again is shown.

The Adaptive High Beam Assist Plus is ready for operation again.
Adaptive High Beam Assist Plus not functioning The Adaptive High Beam Assist Plus is defective.

Consult a qualified specialist workshop.

The lighting systems of the Mercedes E-Class W212 (model years 2009–2016) provide the best visibility and safety. Whether low beam, high beam or turn signals, all elements are precisely monitored, and faults are signaled to the driver immediately.

Thanks to intelligent light management, the E-Class remains a model for visibility and protection. Regular checks of the lighting contribute to road safety.

Question: What should be done if an LED light unit is defective?

Answer: Since only a complete failure is indicated, a specialist workshop should check the unit and replace it if necessary.

Question: When is the message “Intelligent Light System not functioning” displayed?

Answer: When the system fails, while the standard lighting continues to work.

Test yourself

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