Interesting. That's the other factor that makes me hesitant, the visibility factor. I was in a couple of accidents on motorcycles as a teenager -- landed on my feet all in all, thank God, but there are too many fools out there who drive on autopilot, and I don't want to get decapitated while trying to improve my fitness level.

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1986 300SDL, 362K
1984 300D, 138K