We have a 2010 Passion, and it's been struck with the bad cylinder #2 bug- after tons of money thrown at diagnosis (and misdiagnosis), we are selling it at a huge loss to a mechanic. It's too bad - we really liked it. Probably if we had brought it to a Mercedes dealer to start with we could have had an accurate dx the first try, but the nearest one is over an hour away so we were stuck with locals. At least $1000 in tow charges, parts and labor, we still have a sick Smart with only 47K. Just thought I would throw the .02 in as I see a few others have also had this problem - we did find a used engine for about $2K, but we just can't keep throwing money at it. I'll miss our little pod car!