Pulled in the garage a short while ago, and immediately smelled a "heavy burning". Of course, I went into a semi panic.......just took delivery of my 35d last week, and just hit 400 miles on the odometer.

Popped the hood, didn't really smell anything of significance in that area, went to the exhaust, tried smelling there, but it appeared to have dissipated into the garage.(remember, I am in a semi-panic) The entire garage smelled like something had been burning. Then I finally recalled reading a thread awhile back that mentioned a particulate filter, and burning of soot at high temperature. (it pays to read these threads!). So, opened both garage doors......let it air out........took the X5 for a quick trip to the store....no engine lights or anything abnormal.......got home.....looked up the particulate filter issue in the owners manual.......thought....uh huh! And, better yet, found this thread which pretty much validates what was going on. (soot burning....I hope)

I came close to calling the dealer, and having them come get it and check it out........but I am much calmer now after reading this thread. You guys do a great job is describing these issues.......

Luckily, the wife wasn't home at the time, or I would have been in a panic for real........as it is.......now I will warn her for future aromas in the garage.....

If anyone thinks I missed diagnosed this issue.....please let me know.......

Thanks again for all the posts......