A while back, I purchased an assortment of parts for my 98 E300 (from someone who sold his E300 and no longer needed the parts). One thing that was included that I may not need is a glow plug controller, part 022-545-75-32. It is new and unused. Looks like a new one can be had for just under $150 from MB (list price is $199), about $110 from several Ebay dealers. I'd be willing to sell mine for $90 shipped if anyone has a need/interest. Otherwise I can hang on to it for if/when mine fails.

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06 E320 CDI "Benson", Platinum Blue, 172k mi, DD
91 300D "Otis", Smoke Silver, 125k mi, other DD
98 E300 "Murray", Silver, 124k mi, Stage 2 Rocketchip chip tuned, son's DD

Twelve other MB's owned and sold
2002 Honda Odyssey 234k mi (want to name it "Homer," wife won't let me)
1961 Very Tolerant Wife