Good news, bad news, good news, and bad news.

Good news: I've never fished the timing chain out, but maybe somebody else on here knows how.

Bad news: if you need to pull the timing cover, you'll have to remove a whole bunch of stuff from the front of the engine.

Bad news: to do the chain at all, you really need the crimper tool.

Good news: can be found on the bay. Search: Mercedes Timing Chain Link Crimper Single/Double Tool,300E,190E,300D,190D,Diesel. Comparatively speaking, price isn't that bad