Blinkers Problems / Speed meter Problems

Hello Mercedes Fans,
I have a Mercedes Esprit 98 and have 2 problems:
1. Speed meter some times works some time does not. I can survive
without this as I have gps which shows the speed as well.
2. could be connectd to 1st might not, but in last time my blinkers do not work when I give direction. Strange enough, some time works. There is also a bit of moisture in the front blinkers box-es. Also when not working lamps inside car do not works.
3. Also cleaner for the windshild work in III ansd IV geer but not in I and II same time when blinkers are out, and when blinkers are ok this is also ok.
any idea what to check?
thnx in advance!
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