Hi Deportes,

Things to check:
1. open roof, but, stop before the clam shell lowers. check the hydraulic cylinders on both sides (in the pockets by the shoulder belt pockets) for leaks. rebuilt/exchange are available, several hours work.
2. get under the car and check for leaks at rear main/transmission, water pump, and rear diff.
4. the seams on both front seats where the side bolster joins the upper panel, they split, design flaw. new seat covers are $775 and expect to spend several $100 to install unless you have that experience.
4. the headlights have the "environmental wiring" that dies. if it has zenon lights the harnesses are available on ebay for less than $50. But, if it has halogens, new Hella's are $400 shipped at ********. replacement harnesses are not available. at least none that I have found.
5. The valve covers are also a normal leak point. not a hard job with the right tools and gaskets are available here. With the right tools, a couple hours with beer.

Don't know what part of the country you are in, but, there are ones showing up here in the southeast pretty reasonable. Remember they are 14 to 19 years old and things are aging, even on the good ones. I have replaced several plastic engine area components due to deterioration. but, the OEM parts from MB have been cheap, $20 to $30.

Brian