Take all clichés about old Mercs (excellent build quality, "clunky" doors etc) as read, they certainly apply here.
It was the best C180 (W202) I could find but unfortunately it came with a nasty, dealer fit rear spoiler which was attached to the boot lid with 3 screws (I am not kidding here). I've removed the offending article and filled in the holes as best I can, but may have to get a new boot lid.
The interior will outlive me. The seats are comfortable and supportive (more so in the back than the front, strangely) and there is plenty of room. The dash is the dash of an old Merc, which you either like or you don't. The windscreen demister is asthmatic and I find I have to wipe the thing with a cloth in winter the way my father had to with his Hillman Hunter. Americanised foot operated parking break and dash mounted light switches are just things that you have to adapt to. The lack of a folding rear seat is irritating.
The 1.8 litre engine is enough, it's not a huge car. Fiddle about with the gears enough and you'll get as much forward momentum as you need. Any kind of meaningful overtaking needs to be done in third. This you will find to be a raucous experience that tends to unsettle the car's otherwise dignified approach to things.
Handling is in keeping with the over all theme of the car. I tend to average late twenties MPG in town and mid thirties otherwise. It will happily cruise all day at 150km/h (90mph).
If you are buying one (and I recommend you do), go for the Elegance spec for the alloys, metallic paint and classier interior. Get one with automatic transmission, and if the car also has air conditioning, the gods have smiled upon you indeed.