When changing a front door seal on one of the above chassis you most likely will ending up need new attachments clips (along front edge of door). The majority of the old clips will break when you try to remove them.
114 115 116 123 126 Chassis Front Door Seal Nylon Clip Set (6)
$9.95
SKU:
BDP-COMDSC6 
Product Details
Genuine set of 6 clips from Mercedes Benz are enough to do one front door.
NOTE: Back door clips on all chassis except the 126 have different clips. These are sure to make installation go more smoothly.
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$12.95
Sedan / Wagon Door Seal Instructions and Tools
There are some tricks to getting a replacement seal in properly
Fits 114 115 116 123 and 126 Chassis. This set of detailed PDF instructions and plastic insertion tools with help you remove and install the front and rear door seals in your older Mercedes sedan or wagon.