I have search all option brochures and lists on the W140 and the ONLY Sat Nav system they list is the one I mentioned above.

As mentioned before, maybe this Nav system was available exclusively for the Japanese market, although I sincerely doubt M-B would spend the effort and money to vary the console so much for just a few vehicles at factory level.

My best guess would be that this system was locally fitted by the local importer in Japan (anyway, they have the technology and know-how to do so).

My first Mercedes-Benz was a 300TD (S123) also imported from Japan. At that time the exclusive dealer for Japan was Yanase. Yanase had (as it happens at most M-B markets) a peculiar list of options and special equipment for the cars it sold.

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A. Rosich
CL 500, 1998
S 500 L, 1998
E 320 T, 1995 [Sadly sold ]