Renault Kangoo 1.3 dCi Diesel – does not start – no Mux

Hello together! Have a medium-sized problem with my neighbor’s Kangoo 1.3 diesel… Now he is in the hospital for a long time, in that time I would like to take care of the car. It started like this… The power steering has partially suspended, sometimes he did not want to start, only after a few times he wanted to start keys back and forth. Now the battery has been empty. Also with bridge and battery exchange the starter does not make a mux. If I have a few times on the starter ha ue he does at least “crack”. So, we then tried to tow the car. We tried that for about a kilometer. The annealing worked anyway. But he didn’t want to jump on. No cougher, nothing. Now to the question: how can that be that he doesn’t jump on with towing himself? Does the power steering have something to do with it? If the battery is full, why doesn’t the starter do anything? Can the ignition lock also have something to say? Is the connection ignition lock – Gen erator – Power steering (electric steering) – Starter – Relevant? Maybe I am also completely on the wrong steamer? I am very grateful for your help.