Way too long!!! My Pfaff takes at least 5 weeks, sometimes it's closer to 8 weeks for just a servicing! That is why I now am a Bernina fan. As much as I love my Pfaff I will never go back to the local Pfaff dealer here to buy another machine!
The Bernina dealer takes 3 to 5 days for a servicing! My Pfaff is now almost 10 yrs old. That is how old they have to be for the local sew and vac place to do a servicing! Guess where she is going next time!!!