Switch seat heating on/off. Switch seat ventilation on/off

In the Mercedes E-Class (4th gen., W212, 2009–2016), the seat heating provides pleasant warmth on cold days, while the seat ventilation increases comfort in summer temperatures. Operation is intuitive via buttons that offer several levels to suit individual needs. Automatic switch-off functions protect against overheating and conserve the battery.

Switch seat heating on/off

Switching on/off

WARNING

If you repeatedly switch on the seat heating, the seat cushion and seat backrest pads can become very hot. If your sense of temperature is impaired or your ability to react to elevated temperatures is limited, this can lead to health problems or even burn-like injuries. There is a risk of injury!

Therefore, do not repeatedly switch on the seat heating.

Driver's and front passenger seat

Rear seats

The three red indicator lights in the button show which heating level you have selected.

Driver and front passenger seat: From level 3, it automatically switches back to level 2 after approximately eight minutes.

Rear seats: From level 3, it automatically switches back to level 2 after approximately five minutes.

From level 2, it automatically switches back to level 1 after approximately ten minutes.

From level 1, it switches off automatically after approximately 20 minutes.

Turn the key in the ignition lock to position 1 or 2.

To switch on: Press the buttonrepeatedly until the desired heating level is set.

To switch off: Press the buttonrepeatedly until all indicator lights are off.

Info

If the vehicle battery voltage is too low, the seat heating may switch off.

Seat heating problems

Problem	Possible causes/consequences and solutions
The seat heating has switched off early or cannot be switched on.	The on-board power supply voltage is too low because too many electrical consumers are switched on. Switch off electrical consumers that are not needed, e.g. rear window heater or interior lighting. When the battery is sufficiently charged, the seat heating switches back on automatically.

Switch seat ventilation on/off

Switching on/off

Driver's and front passenger seat

The three blue indicator lights in the buttons show which ventilation level you have selected.

Turn the key in the ignition lock to position 1 or 2.

To switch on: Press the buttonrepeatedly until the desired ventilation level is set.

To switch off: Press the buttonrepeatedly until all indicator lights are off.

Info

If the vehicle battery voltage is too low, the seat ventilation may switch off.

You can use the "Comfort Open" function to open the side windows and the sunroof. The driver's seat ventilation then automatically switches to the highest level.

Seat ventilation problems

Problem	Possible causes/consequences and solutions
The seat ventilation has switched off early or cannot be switched on.	The on-board power supply voltage is too low because too many electrical consumers are switched on. Switch off electrical consumers that are not needed, e.g. rear window heater or interior lighting. When the battery is sufficiently charged, the seat ventilation switches back on automatically.

The seat heating and seat ventilation of the Mercedes E-Class W212 (model years 2009–2016) provide maximum comfort in all weather. Thanks to multi-level settings, the seat climate can be individually adjusted and regulated automatically to prevent overheating or unnecessary power consumption.

These intelligent systems make a significant contribution to the feel-good factor in the E-Class BR 212 and make every journey pleasant, whether in cold or heat.

Question: Why do the seat heating or ventilation sometimes switch off by themselves?

Answer: To protect the battery when the on-board power supply voltage is too low, or for safety reasons during prolonged operation.

Question: How can the seat heating be reactivated?

Answer: Switch off consumers that are not needed and switch the seat heating on again once the battery voltage is sufficient.