My question is, will a dashboard from a 1989 420SEL drop in to a 1982 300SD or will I have mounting bracket and HVAC plumbing nightmares?

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-SpecialDelivery
1985 300CD Silver/Blue H&R Suspension (Sold, still cryin over that)
1982 300SD Silver/Blue '85 OM617 (Sold)
1982 300D - Blue/Blue (Sold)