The 5-speed manual (often a Getrag with overdrive) is prized for highway drivability and is considered rare on the diesels, since US-market cars typically came as automatics. There is a dissenting view that the 4-speed is the more durable choice, with 5-speeds said to suffer tailshaft bearing problems.
Transmissions: 4-speed vs 5-speed, and automatics
Mercedes-Benz Gelandewagen (W460) · mechanical