Definitely an aftermarket unit.

The W140 could be factory fitted with a GPS unit for the German and some other markets. This unit was very similar in design and the same size as the M-B Exquisit radio/cassette/CD (which was the one fitted on the U.S. market sans the RDS feature). Only difference was that it had a bigger liquid cristal display. The aircon console and upper buttoms would remain in the same place.

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