I was thinking about how long our cars could last every day run at top speed on the autobahn. I was having a conversation with a buddy of mine the other night. He thinks they'd "blow up after 50k" but doesn't realize they're designed and geared for the autobahn hence being German cars.

My E300s will run 140 all day if it were legal, but let's say from new I'd be curious if it would hold up with high RPMs every day for 300k without an engine rebuild.

What do you guys think on this?

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k