My daughter just bought a 2004 Cooper. We went to get the oil changed to find out that nobody can get the top cover off of the canister, any advise out there would be great!!!

The oil filter cannister cover can be and usually is very difficult to loosen, even when torqued to spec. In order to remove a 'tight' cover, you will need:

1. the correct socket to fit the cannister cover. (see our p/n NME1051)
2. a 'breaker bar' to provide additional leverage.

I've come across this on my '05 MINI and always have to use this method. The space it tight, but with the correct equipment you will be able to loosen the cover.