If you had both complete cars side by side you could swap all the electronic components from the CDI into the wagon. The only real difference is the rear tailgate. You could do it without xentry. A simple icarsoft would be enough to Id compatibility, read live data and clear any codes that might pop up.

I've seen people do C32 and C55 drivetrain into a c240 wagon in their garage without issue. This isn't much different. I'm still not convinced this is a worthwhile endeavor but it's certainly not impossible for the average DIYer.

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CENSORED due to not family friendly words