I have one. I love it.
one warning. if you don’t intend to get the convertible, don’t test drive it. I wasn’t going to get one, test drove it, and bought it. the joy of being able to put the top down at speed, like a sunroof, is intoxicating.
best case usage for it is probably a slightly longer than average generally highway bound commute. the in-city mileage is around 35mpg, which is not bad, but not great for the size of the car, I suspect the automatic shifter, it tends to shift a bit lower than I think is a good idea. apparently there are improvements in the 2009 model. (we’ll see, due to popularity and a snafu with my reservation, I’m due to have my first one repurchased by the dealership, (at sticker price,) when my actual reserved car shows up sometime in the next 2 months.)
highway mileage on the other hand is around 52 mpg. I drove from seattle to portland and back and measured the mileage from that trip.
the car is very comfortable, I have the comfort package, with the heated seats. I’m 6’1" and there is plenty of room for me and my various groceries. (and even one friend!) I have to move the seats forward a considerable amount. if someone is complaining about space or ergonomics I really have to wonder what shape that person is in (or perhaps what were they wearing…) I’m a reasonably large person and I have never felt cramped. four doors or seats are not one of my requirements, and I can’t see any major benefit to a roadster shaped 2 seater. I have in the past owned a Caprice Classic wagon and felt cramped by a front seat that would not go far enough back.
one of the greatest parts of owning one is the joy you get while parking, and to some degree at the gas station. the number of parking spaces that are open to you with one of these cars is fantastic. and the smug feeling you get pulling into the gas station next to an SUV driver giving you a dirty look is priceless.
the shifter takes a bit of practice, it is a manual transmission with an automatic clutch. if you time the pressure on the gas pedal with the shifting when it occurs, most if not all of the diving and lurching goes away. the wheel base is short, so any pitching motion is magnified to a degree. but that particular problem is completely avoidable. for the first month or so I used the manual shift option most of the time, though as time passed, I tended more towards the fully automatic usage. this issue is no more or less then first learning how to drive a stick. is there anyone here who did not lurch the first few times into first gear? second? eventually you get good at it. same applies here.
It is not what I would call a car for someone in a hurry. it accelerates well, but not spectacularly. the automatic shifting is not over active in my experience, I think it might up-shift a little earlier than I might prefer, but it does not go up and down a lot unless I spend a lot of time accelerating and braking hard. I tend to drive a bit more passively in traffic, so the issue doesn’t arise. like any different transmission, you the driver has to adjust to the new mechanics. most reviews that I have read that go after the transmission are by people that are getting into it expecting something completely different. the dealers and demonstrators go through a bit of explanation before you get in, starting with the question “you know the tip-tronic? this is not that!”
I have now had the thing for about 6 months and have never been happier with a car. bear in mind that these cars have been on the market and very popular in Europe for over 10 years. If they make sense to you, then it might be a good car. if it doesn’t make sense to you then it probably won’t be a good car for you. If you have kids, the 4 seats are probably an issue, (assuming you are still married.) one of the things that I noticed at the dealership was that there was a fair amount of dog hair in the demonstration models due to people bringing their dogs along to see if they fit. maybe eventually mercedes will import the forfour as well.