Is there a Marriott in Dusseldorf? When I looked into Marriott properties last year for DUS DO, there was just a Renaissance & Courtyard by Marriott (going from memory here; maybe there was a Marriott & it was high-priced, but I thought only R & CbyM). The R & CbyM are in 2 sep areas, so think directions would be dif depending on where you're staying. Cheers.
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Sharon