1997 E420 - Rear roller sunshade stuck in up position

I went through 3 fuses area in the car, but I don't find fuse marked for rear roller sunshade. Please help.







Only reason I was trying to bring roller sunshade down was that my 3rd brake light is not working, I wanted to change the bulb.
I always leave my roller sunshade up, but one time I want it to go down so I can change the bulb on 3rd brake light, it is not moving.
(oh sorry, asked and answered. it was late and i had a huge Mothers day dinner.
Last edited by raymond g-; May 12, 2014 at 10:23 AM.

Late yesterday I manually played with the roller track to see it may make it lose and work. But did not work.
Finally clean the switch contact and it is working again.
Just to be safe, I am keeping the roller rear sunshade in down position.
Next question, any one know how to open cover on 3rd brake light? I have to change the bad bulb in it.
See photos of 3rd brake light. Please help.

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Week befor last week this forum saved me also $600 on my W221 (2007 S550) on door control module by telling dealer to reflashed it rather then replacing with new one.
Thanks again all.
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