I have a 99 sl500 and a 2000 e320. The shift modules or actually the shifter are similar but not exactly the same. The 99 has a position for 1-2-3-4 and drive or OD and the e320 has a semi manual type, Probably just an improvement between years, I like the e320 better, as it is more designed for sport driving. Can they be swapped? Is the software or programming the same and the physical design the only difference? Anyone know?

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1987 300 TDT
1990 300 SEL