Innenraum: Bad smell

[pepaaa]

Hi,

I was wondering if anybody could help me. I think I have a problem with the inner air circulation.

If I switch to inner circulation there's always bad smell coming from fan exhaust, as if I was driving behind 10 big lorries. It doesn't matter if the air quality outside is good or bad, it always smells really bad.

Normal air coming from outside is fine... I bought the car a few month ago. I had all interior/exterior air filters replaced at the same time and I don't know if it was different before.

Where is the air used to re-circulation coming "from"?

Please help

Greetings!
Pepaaa

[Dr. Kohl]

this is my result:

 Aktivkohlefilter wechseln?

 Gestank zum zweiten

 gestank

 Geruch nach verbranntem Gummi

 Lüftung stinkt

[Erich]

There are special desinfectants on the market to clean the heat exchanger which sits just right behind the firewall.
You said that you changed the filters already. Please be reminded that there are 2 under the hood and also 2 (?) inside of the passenger cabin.

There are professionals who clean these systems. These heat exchangers are a breeding ground for bacteria.
Is there often moisture inside the car on the front window? It might be that the moisture from the heat exchanger is not dropping out of the car cause the drain holes are clogged. Check that one out.
You can also try by yourselves to 'sterilize' the system by using 75% alcohol in a spray bottle. Set the system on recirculation and spray this alcohol mixture into the air suction system.
On my website below there is a special page for the E38 in English, e38.org. Go to that site and look for the tech tips to change the filter system.

And do not drive immediately after you used the 75% alcohol for cleaning

If you prefer English language boards, here are the best ones:
 http://www.bimmerboard.com/forums/e38/
 http://bimmer.roadfly.com/bmw/forums/e38/
and local ones in your area:
U.K.:
 http://www.the7seriesregister.co.uk/forums/index.php?
 http://www.bmwcarclubforum.co.uk/
 http://www.bmwland.co.uk/talker/portal.php

NEW! Soon coming
 http://www.bmw7resource.co.uk/