First oil change on this porsche

[eomak]

Hi, i'am in the process of changeing the engine oil my first time on this porsche 03boxster.After taking off main plug and oil filter ,isnt there suppost to be a alumiun ring around the main plug and a rubber ring around the oil filter housing cap thingy?Also the oil filter looks a bit smaller but wider in the middle then the 996 107 225 53 new one i have.I 'am guessing the rings where'nt replaced? Doesnt have any oil leaks,but where do i put those new rings?Its jsut hard to c under the car just using jacks on one side.