After 3 months, the hair dryer was so slow on the mind, that is regardless of whether with or without MP .. it had no force more (was heard) and also he no longer was enough heat as in the beginning.
I was so convinced of the hairdryer that I have returned it. Amazon is of course great and no arguing, I could jerk-twitch return the hairdryer.
-> After 3 weeks I got a new device and give it a second chance! Thank Philips that you were so accommodating and I have immediately sent a new device :)