Hmm the call center was part of the assistance service offered by the brands so customers were free to call us for any trouble and we could always forward them to the right people if needed. In that case however, there was nothing to be done as the car was perfectly fine and a mecanic wouldn't have solved the problem. Still, we could have arranged a taxi ride or a hostel reservation if there was no way he could solve the problem by himself.

(might be useful to add: those brands are among the best when it comes to customer assistance)