experience standklima new actros ?

Hello together, someone has experience with the original standing climate in Actros 4, are known as problems, who is satisfied or dissatisfied.. we have now some running and at most is the memory after 4h empty, the display of the level indicates how it is funny.. in the work at the collection you have said it keeps up to 11h.. (probably in winter) would please me infos.. thank you.. greetings