The rentals don't have the "crap beaten out of them"......when I was there we had a 1 year old c220 cdi 6 speed...that thing could lay down a patch, easy. It only had 11,000km on it....that's not even 5,000 miles! It drove perfectly....and was a sweeet ride....way more fun on the autobahn than any of our ancient diesels! It was just stretching its legs at 120mph.....we took it to around 150 before it ran out of steam.
Believe me, you would not want to be driving a 220d there.....especially on the autobahn. 
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-diesel is not just a fuel, its a way of life- 
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)
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