The is a Mercedes Genuine O.E. front seal with a special trim tool included for ease of installation.
For all W108, W109, W114, W115, W116, C107, W123 and W126 models up through 1985. The kit includes a new O.E. seal, special tool, and Kent's video instructions. Read the reports online from others who have tried to install this seal and you will understand why you will be happy with Kent's solution.
1968 to 1985 Sunroof FRONT Rubber Seal Replacement Kit w/ Instructions
$44.20
SKU:
BDP-FSUNROOFSEAL 
Product Details
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$34.75
1968 to 1985 Rear Sunroof Rubber Seal Installation Kit
For all 108, 109, 114, 115, 116, 123, and 126 (up to 1985) with video instructions
You can buy a rear rubber seal anywhere, BUT there is nowhere else you can buy one with instructions, tools, and supplies to make it easy for you to do the job right the first time! Kent will show you some tricks that eliminate long-term problems and make it look pretty at the same time.