Welcome to the TD club, Andrew! I've got about twice as much invested so far as you do but that's only due to pure luck and timing. At the very least stabilize those roof and pillar spots with some POR-15 to keep them from getting worse. Those aren't inexpensive or easy spots to repair (at least for an autobody repair novice like myself) so at least put a stop to it ASAP.

There is a common saying around these parts, the most expensive car you'll ever own is a cheap Mercedes. Yet you'll notice that a good portion of the members own more than one. That speaks volumes.

Good luck!

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1980 300TD-China Blue/Blue MBTex-2nd Owner, 107K (Alt Blau) OBK #15
'06 Chevy Tahoe Z71 (for the wife & 4 kids, current mule) '03 Honda Odyssey (son #1's ride, reluctantly) '99 GMC Suburban (255K+ miles, semi-retired mule) 21' SeaRay Seville (summer escape pod)