What does Mercedes-Benz do differently with their EGR systems? It seems a common issue with VW and even larger American diesel engines. I seldom read about EGR valve or EGR cooler issues with Mercedes-Benz. Do they take a "better" or different approach? Just courious.

They stick (open closed half way sometimes). Most people opt to not employ their use therefore eliminating the need to wonder about such issues.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I threw mine away two years ago, its working very well!

They get stuck open once in awhile.

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1999 SL500
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Better in the way that a simple BB in the vacuum line can render it useless unless it is stuck open.