Thanx to this topic I managed to change my S-MAX cabin filte. Since I have left hand stearing, filter was on the driver side. Listen up! I had to remove accelerator to change the filter :) Anyway I have a bigger problem also! It's not the reason I changed the filter, but I have exhaust gases in the cabin. No problem when driving but if parking or waiting the green light with running engine feels like exhaust is directed in the cabin. And now last problem not enough warm coming at air conditioner to heat up cabin normally (outside temp. +5*C). Exhaust problem is more intensive after long rides! I have 2008 S-MAX 2.0 tdi Any ideas before going to the service? Thanx!