Here's a W140 with a 606 equipped just passing over the 500K kilometer mark...For the first time.

At top speed of course.

http://benzworld.org/forums/forums/thread-view.asp?tid=1173915

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)