I've done 25,000 miles over the last year, which even surprised me after I calculated the numbers. Touching wood while I say this, but the only breakdown (as in "Hello Auto-Club?" ) in the 17 months that I've owned the SDL was a fried Starter Motor.
Lots of 'Preventative Maintenance' though and I haven't yet summoned the courage to add up all those bills

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1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1986 Porsche 928S Goldweiss/Brown