I bet this is my 123 problem too. window works fine, but doesn't go to the top, clunk clunk at the end. now to learn to replace the regulator! I am in the middle of replacing the sliding jaw on my 126. Thinking about subscribing to pindelski.com for the photo articles, but I'm cheap... probably try it on my own first.

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83 300SD
81 300D
79 300SD
All Running on Biodiesel!