The prior owner of my '98 E300 put in LED taillight clusters. They're a tad more modern if you care about that, and so far seem to work very well. They can be had affordably on eBay. Just something you might want to look into before factory replacement.

Cheers, John

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