Odd intermittent electrical faults.
It's more like a small saloon than a sports car. The automatic gearbox and the drive by wire throttle make it very unresponsive. Once it has responded it is OK.
The roof is good, the car is significantly quieter than a convertible on the motorway.
I have driven both the automatic and the manual transmission SLK 230 and found the automatic to be a dog compared to the manual... if you were looking for a sports car you should have chosen the more sporty option. It makes a world of a difference.
If you've got the steptronic box in an auto car you can drive it like a geared car and its very responsive in this mode!