No longer an air filter button

you recall the button on the dash that you can put on (or leave on) in order to filter bad air, for example when you're behind a smelly school bus etc.
It worked perfectly.
Now in the 07/08's there is no such button, but I am noticing exhaust smells that can't be filtered out.
Is there a way to filter this without having to hit the air/recirculate button?
It seems that MB took a step backwards in this regard.


I had this same question. When I have the re-circulate button on, there is no smell... When the button is off and air is entering my car sometimes I get strong smells like diesel from buses etc... The car is 6 months old so I do not think the filter needs replacement..
Any feedbacks would be appreciated..... Thx.

Perhaps a misplaced hose???
2007 S350 Long - Black on Black
2002 Nissan Maxima
1984 280SE - Silver
1974 450SL - Silver
1958 Jaguar XK150 Convertible- British Racing Green


