I just performed the 27th oil change on my 2004 A6 and traded it in on a 2012 A6 (3.0 T). I'm preparing for my first oil change. The first things that I noticed were: canister oil filter has been replaced with an element filter and there is no longer a dipstick. Is there any major difference that I need to be prepared for?
Very late reply, but I'll still go for it. You need a 36mm socket for the filter element housing and should be a 6mm hex wrench for the oil plug. It is easy to spill oil from the filter housing unless you open it very slowly and then I still suggest putting a paper towel under the filter housing to absorb the small amount of oil that will inevitably spill. Really easy oil change once you get used to it. Don't forget to change the gasket inside the filter housing and make sure you align it correctly (with the tab facing outwards towards you). Note the instrucitons on the Mann filter box or pay close attention to the oil one before you remove it.
First - thanks S4_Cinci for the reply. I have a few oil changes under my belt now and I'm ready to help others if anyone needs a few tips. We'll start with the required tools: to remove the belly pan you'll need an M8 spline (twelve point thingy) for the four large screws, a T30 TORX (six point thingy) for the three aft screws and a large (no. 3) Phillips screwdriver for the remainder of the quick release fasteners. The drain plug is removed with a 6mm hex bit (Allen) and the filter housing (up top) requires a 36mm socket. After you drain the oil and remove the old filter element you can use a pair of hemostats to reach down and remove the rubber filter seal by the tab that is incorporated into it. A small pocket knife blade will help to remove the O-ring inside the filter housing. The required torque on the filter housing is 25 N-m and I've been using the same on the drain plug because I don't have the spec. yet. If anyone knows it I would appreciate the info. I'm pretty sure there is no seal (like nylon, aluminum, etc.) on the drain plug - just a conical metal-to-metal fit.
For the 2012 A6 3.0 the filter element part number is 06E-115-562-A.