The Room Service at Hotel Koe59
The room service at InterContinental Dusseldorf is mentioned by professionals. Of the 3 professionals that we tracked, 2 praised the room service, such as Star Service and Oyster.
Hotel Koe59 
Star Service
Oyster
Star Service "Room service is available around-the-clock, with limited menus provided between 1 am and 4 am"
Oyster "Travelers could also consider the Hyatt Regency Dusseldorf, which has a gym, several restaurants, and 24-hour room service, although rates will be higher"
