Unless you've sucked up a great deal of water with your Miele, it's not the motor. My guess would be the cord reel. If you open the bag door cover and gently squeeze the two places where it attaches to the main canister and pull upward it will come off completely. This will reveal several screws. Removing these screws will reveal a few more. Then the upper and the lower halves will come apart giving you access to everything. A simple continuity test will tell you whether the problem is with the switch, cord or cord reel. Best of luck mate.
www.bobsroswellvacuum.com, October 2008