Co2 in Cabin -1994/319i

Just bought a used 1994 318i -- seems to be strong exhaust smell in cabin... all mufflers/exhaust seem ok,,, no rust thru, etc.. Any suggestions where I
should be checking? Any and all help much appreciated... thanks.. RG

The novelist George Eliot once said that "it is never too late to become
what you might have been."
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.