Though the Mercedes M-class now faces serious competition at the upper end of the 4x4 market, the premium German marque apparently does not believe it is necessary to radically change its SUV.
In fairness, sales statistics probably support their opinion and sales statistics show it retains its popularity despite strong competitors such as BMW's X5.
Therefore, most changes for the new model will be made to the car's chassis, engines and equipment, while the general design won't differ much from today's ML.
These photos, were taken during one of the few times the testers left their secured proving ground.
Production models will again be built in Tuscaloosa, Alabama, together with the new GST which is a derivative of the next M-class.
Both new vehicles are due in European and Asian markets by 2005. The additional GST-class brings production capacity from today's 80,000 units per year to 200,000.
While the new M-Class will remain the luxury 4x4 off-roader with perfect on-road capabilities, the so-called Grand Sport Tourer will be a super-luxury crossover (the term given to vehicles that offer a mix of off-road and Multi-Purpose Vehicle -MPV - capabilities).
Computer-controlled air-suspension will be standard for the GST while it will be an option for the new M-class. The new SL's sophisticated brake-by-wire system, though, will feature in both cars. While the new M-class will be a five-seater, the GST will feature three rows of seats
GDI V6 petrol engines with three-litre or 3.6 litres (231/258 bhp) as well as two common-rail diesel V6s, 2.6-litre or three-litre (190/218bhp) will be available from the start. A five-litre V8 with 300 bhp will be offered for both cars later, as well as a 5.5-litre V8 with 350 bhp for the AMG-version.