Heck, Honda Accord offers a voice activated DVD based navigation system now. Acura has had a touch screen DVD based navigation system for years. Why does mercedes still have a CD-ROM based toggle switch driven navigation system? You need about 10 CDs to cover the US alone, and you may need to change CD's if you go from one state to another. No such hassle in the Accord or the Acuras. Why is mercedes behind these guys? Why can't it be in the forefront of technology? And navigation systems are not useless devices. Like antilock brakes, airbags (and wipers some 50 years ago - yes, wipers were optional accessories in the first half of this century!!!!), etc, navigation systems are going to be standard accessories in most cars in 10 years. Then why is Mercedes behind others???????????