Cabin Filter On W140,300se
 

I just changed the cabin air filter on my 92 300SE,inside the
engine compartment,I had to leave my work for a couple of minutes and when I finished cannot remember wich one of those vaccum lines(red/green) that I have to hook back on(along the filters housing) is first? green one or red one,they have the same lenght so they are interchangeble,what is the correct installation?

If that's for those 2 vacuum actuators on the side of the cover, I'd say you can hook them up either way, they both do the same thing- open the fresh air flap.

Gilly