Awesome, thanks for the help, you guys. The local dealership by default just tells you that you need the whole new assembly for any W210 -- housing, blower, etc. I pointed out that there's a VIN split, and only then did they quote me the single part. I've got it waiting in will-call, and will give the replacement a shot tomorrow. Just gotta remember how to disassemble that underdash, and will be working in a 90-degree asphalt parking lot. Fun times ahead.

Thanks again for the tips!

Cheers, John

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'98 E300TD (W210) | Sold 6/09 with 205k and counting
'04 VW Touareg V10TDI