I was going to post, but pudding nailed it.
You might consider replacing the whole 'oil filter housing assembly' w/pn:06F 115 397 K
The assembly comes "with" new seals, and the primary oil separator atop of the assembly will be free of any carbon buildup.
The bolt torque for 'assembly-to-block' and 'oil cooler-to-assembly' are both 15Nm (11 lb*ft).