Rear Electric Shade?
Nik
If it is actually raining, it may wipe constantly. You can check your manual to be sure... but according MBUSA... in 1999, the CLK 320 had that option:
Package K3 Power tilt/sliding tinted glass sunroof. Rain-sensing intermittent windshield wiper. Electric rear-window sunshade.1 $1,290
If my memory serves me correctly (doesn't rain much in So Cal, so don't use much), there are 3 settings when you turn the wiper. 1st Click = Auto sensing
2nd Click = Constant
3rd Click = Fast-Constant
Or try this... Start your car.... Turn the Wipers stick 1 click (nothing should happen).... pour a cup/bucket of water on the back of the rear-view mirror.... the wiper should wipe 1-2 times until water is gone... then it will stop again.
Thats proof that you have the feature.
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The bucket would be a complete validation that the complete system works. Just turning to the first click and nothing happening should let you know that it is the rain sensing wiper (assuming it is not raining) and you don't have to find a bucket. If you don't have the rain sensing wiper I think it is set to once every 5 seconds.
That's why we don't leave it in rain-sensing mode all the time, during the dry season we'd scratch up our windshields.
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