I'm assuming this is a sunroof drain clogged or otherwise malfunctioning, had our first really hard rain and the boy-child says "um, there's water here" lol..
Sure enough, leak after sitting but not while driving from the pass rear seatbelt shoulder belt opening in the C pillar cover. Known issue by chance?

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One more Radar Lover gone...
1982 VW Caddy diesel 406K 1.9L AAZ
1994 E320 195K