Air conditioning

Switching air recirculation on and off

~1min read
WARNING

When outside temperature is low, only switch air recirculation on temporarily. Otherwise, the windows may fog up, reducing visibility and putting you or others at risk. You would then no longer be able to assess traffic conditions and could cause an accident.

If outside odours are present, you can temporarily shut off the fresh air intake. During this time, interior air is recirculated.

Air recirculation operates the same way on all control units.

  • Turn the key to position 2 in the ignition switch.
  • Switching on: press the button.

The indicator light built into the buttonlights up.


When outside temperature is high, air recirculation switches on automatically. The indicator built into the buttond'air se met en marche automatiquement.does not light up when air recirculation
switches on automatically.

Fresh air is mixed with recirculated air after approx. 30 minutes.

  • Switching off: press the button.

The indicator light built into the buttongoes out.


Air recirculation switches off automatically
  • after approx. 5 minutes when the outside temperature is below 5 °Cau bout de 5 minutes environ lorsque le refroidissement avec déshumidificationapprox.

  • after approx. 5 minutes when cooling with air dehumidification [5] is switched off
  • after approx. 30 minutes when the outside temperature is above 5 °Capprox.

Test yourself

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