Dmitry Baikov wrote:
looking for a bus for berlin/cologne did not give me any result.
There is a bus once daily to Duesseldorf near cologne (http://www.berlinlinienbus.de/) ((no English version yet, its germany2007!!^_°)) 74 eu for a return ticket. A pdf timetable is here: http://www.berlinlinienbus.de/pdfs/dus.pdf
payment with credit card, you should book several days (at least five) in advance as seats sometimes become rare.
BUT: at least a 10 h trip, i cannot recommend it.
http://www.mitfahrgelegenheit.de (pre-arranged lifts in private cars) is used a lot and usually works well.
people charge ~25-30 eur for the trip. Unfortunately everything there is german, you get email and/ore phone number for making an arrangement. I offer help in searching/translating/making phone calls to german numbers.
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