I just installed a new door check strap on my '88 300CE, but didn't lubricate it. Also, there was a plastic shroud which I left off, as the original broken strap didn't have one.

The part cost $31.50 from the dealer, so I'll probably leave well enough alone and replace it years from now if it wears out before I do. Anyone know the purpose of the plastic shroud? Should I re-do this project for that and lubrication?

Thanks for any input.

The cover is there to keep DIRT out of the grease on the strap.

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The strap comes lubricated, the cover keeps the lubricant from washing away. Its your call now that you know how to do it, it will probably last for years.