Here are some commutes, not as long as yours though. When the car was my mom's daily driver, she'd drive me to school, which was 10 miles away from home (grades 3-8). So, she would put at LEAST 40 miles on the 300SD a day. So, at the mininmum, on a typical school week (5 days), she would put about 200 miles on it a week. When I started driving it, I would put no more than 20 miles a week on it, mostly neighborhood hops. But then, my dad has started driving the car daily now, so, I think he puts about 8 at the least, and about maybe, 100 at the most miles on it a day, with some exceptions. One day, he put about 200 miles on it. About two weeks ago, in a three day period, he put about 400 miles on it (Galveston TX, Houston TX, IAH airport, River Oaks area, Alief, TX). It got a pretty good workout back then.
-Joe

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.