I found a one-inch rust spot and half-inch perforation under the trunk-gasket near the right tail-light on my '82 240D. I applied some foil tape to the underside to block the hole and support the repair. Then I lifted as much of the gasket as I dared in order to remove as many rust flakes as possible, before sealing the area with some non-hardening tar-base sealant. Will see how it holds up. May have to try some POR next time.
Happy Motoring, Mark
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DrDKW
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