The suspension gave a very noisy and rather rough ride after about 40000 miles. Until that point, it had been outstanding.
Four out of six speakers failed, and we don't exactly play the radio that loud.
At 58000, we ran into a problem where the car would just stall after driving about 10 minutes. You would coast to the side of the road and wait a few minutes before it would start again. Over the course of about 2 months and multiple visits to the mechanic, the problem just keep getting worse and worse until it would take up to 30 minutes to start after it stalled.
This was all we could take. After work to the tune of $1200 that did not fix the problem, I traded it for a Subaru.
It was extremely stylish and great looking, very quick, and extremely comfortable interior. The controls were laid out well and everyone thought this car was a real class act.
My wife loved the 300M, but I couldn't risk her or our daughter breaking down further. She really misses that 300 M, but I figured it was going to get a lot worse before it got any better.
Chalk it up to first year model maybe...