My 602 had the older VP design, the one that could drop the ball bearing into the engine. Not sure if the newer ones did though. Yours probably is like mine with the open cage design.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

http://www.fuelly.com/sig-us/40601.png