I booked the Mercure Hotel with the expectation to spend a three days week-end in a confortable and relaxing atmosphere. I was participating to the ironman triathlon in Duisburg, and I wanted to avoid any stress by staying in a Mercure Hotel franchise. The result was totally the opposite from my expectation. Over the three days period, no hot water was available for shower during two days !! I had to take some cold water showers in the morning !!! When I did feedback the reception about the situation, they told me that "this is not their problem, it is a technical problem". I had to complain a few minutes to get their apologize !!! it was mentionned on the Hotel notice car parking where available. It was simply a lie, only few park places where avaible (<20). I had to park my car in a industrial area street in a zone where parking was somehow tolerated but totaly unsecure. A lot of Hotel residents were also in the same situation. The reception desk managers where absolutely unfriendly, showing no empathy and showing no respect for the customer. I was expecting at least at bit of fake empathy about the hot water problem but no miracle happened. Staying at the Mercure Hotel Düsseldorf - Ratingen was unpleasant and I do not recommend anybody to stay there. It should be mentionned in their introduction that hot water is not available everyday, and that you can park your car but not at the Hotel.