I found that the left rear end of front undersheild pastic sheet bent down and is loose.

I thought the bolt was not tightened, but it seems that the metal part into which bolt goes has been detached from the body.

Is it expensive to repair this?

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1992 300D 2.5 turbo diesel. 319 k miles.
124.128 chassis, 602.962 engine, 722.418 tranny.

If it the similar to those on my '87 300TD, they are rather simple bolt retainers that snap into receiver holes. I believe the holes are actually rectangular. Not certain, but they certainly don't appear as if they would be expensive to purchase and they are a breeze to install.

Someone else more familiar with your model may be able to correct me if I'm wrong.

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Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.