Different part #s.

123 720 27 46 for the left front in a sedan.

123 720 25 46 for the left coupe.

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83 SD

84 CD

Thanks for the part numbers. I played around with it today. I think it is an adjustment issue as I can pull it up while holding the up button. The up and down motion is too tight somewhere, slowing to a crawl as it approaches the top.

__________________
85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)

http://www.peachparts.com/shopforum/diesel-discussion/257039-stuck-window-question.html

Post #3 has a pic of my regulator.

The FSM file is too large for the site, PM me with your e-mail address, I'll send it there.

__________________
83 SD

84 CD

Yep, the teeth on the regulator are worn down. Does the 300SD with the longer doors have the same part number? Just fishing...

__________________
85 300CD Signal Red/Tan sold
83 300D Manganese Brown 109K
97 E420 Midnight Blue 197K sold
98 BMW 328i Vert White 100K, sold
95 BMW 525i White 125K, sold
93 BMW 525iT Red 193K, sold
95 E320 Green Wagon 125K, sold
94 E320 White 127K, sold
85 300SD 156K Grey (Annie), sold
84 300D Lapis Blue 170K (Judy), sold
99 ML 320 Black (lease), 1998 C230 White (lease)
00 Honda S2000 Red (lease)
86 Mercedes 300E (sold)
84 Porsche 911 Red (sold), 1965 Porsche 911 White (sold)