I became the owner of my first Merz 2 weeks ago. I switched from Mazda MX-6 to MB 420 SEL, year 1990, it has around 130K miles on it. I bought it for 3900. I'm REALLY enjoying driving it! Even 16 miles/gal doesn't scare me

And today my lovely SEL surprised me for the first time I opened left driver's window and couldn't close it. I press the button, hear some clicks inside the door but nothing happens. And I couldn't event close the window manually. I was raining and I got pretty bad experience driving my MB with my face all wet and cold I kept trying to close it and after some time the window went up just fine.

I was just wondering, is there something else I need to expect from 16 y/o MB beside valve guides and camshaft chains? Anyone else here has a 420 SEL?

Thanks,
Paul.