Carrameow,

You should have a look at what my neighboring Germans fit in their cars... The average German family exists out of several beer-bellied members; put that family in one car and let them drive that car on the "autobahn".
The 240D will do fine and will only need a few additional seconds to get at speed...

greetingz,

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1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)