There is a bit of a rough idle when cold.
This is a dream car; the perfect car to eat up hundreds of miles effortlessly; set the cruise at 160 k and just cruise; quiet, soooo comfortable, classy and reliable; we recently left it unplugged at the airport and jetted to Jamaica; came back to a car left in the -40 weather for a week solid; 2 turns and it went; the best car I have ever owned.
I also have one (3/7/07) with 112,000 miles. I also bought a new 500 sedan. The latter sits in the garage except for short trips. I use the 420sel for trips of 500-3000 miles with a better ride, less fear of a breakdown and a real saloon feeling. Best saloon ever made.