John, I found your question while searching for the same thing. I'm having an issue with the retractable power cord with mine. Mine will retract fine, but there seems to be a loose terminal connection on mine. As I pull the wire out, the power light flickers on and off and I have to play with it to get it to say on long enough for me to vacuum.
If this is the same electrolux 2100 canister vacuum that I have, then this is how you open the canister.
You open the front door and remove the bag. Then the two rails on the sides slide out towards the front of the canister. Then the rear panel should come off pretty easily. It might require a little bit of wiggling, but nothing major. This will loosen the lower and top halves and you will be able to see the different components inside. When I say loosen, I mean that the panels will actually come apart, but there are wires that are connecting the individual components to the top half preventing you from pulling the top off completely. This is as far as I have gotten. If you get further, shoot me an email at msa4033@yahoo.com.
Majid Anwar, August 2007