Hydraulic leaks or hydraulic pump failure.
Mercedes clk convertible leaking roof.
Cabriolet not operating fully through cycle or stops halfway.
The majority of mercedes convertible problems are caused by a bad relay weak lift cylinder or lift cylinder leaking by the o ring.
Common mercedes clk soft top roof problems.
Alignment issues with roof frame.
Convertible roof is stuck open shut.
My 2006 clk 500 roof leaks when it rains.
My 2006 clk 500 roof leaks when it rains.
If waterproofing the fabric part of the roof solves it temporarily then it seems like you probably have tear in the canvas.
It drips down on both passenger and driver side near where the window meets the closed top so drops fall on the seats near the windows not in the middle of.
If you find out that the convertible top reservoir is low in fluid that means that you have a leak most likely at one of the convertible lift cylinders.