I had a tiny problem with my one year old V15 Detect. The purple sealing of the golden motor housing began to rib off over a range of approximately one centimeter. I was told to send the device to the Service Team here in Germany in order to let this deficiency being checked. After just three days I got back a completely new power unit having a red instead of a purple sealing and a more golden shining housing. In addition, a small sheet of paper was enclosed informing me about the differing colorization and giving me the opportunity to obtain a power unit with the original colorization after its availability if desired. 

I just want to say thank you for this great support. And just for your information: I will keep the new power unit. ;)

Best regards