....timing belt, spark plugs and upgrade my wheels to 18in rs6 wheels. now before I did my tb, my temp gauge always stayed in the middle and my oil temp stayed just shy of 200. now after the tb I noticed that the temp gauge shows the needle in between the middle and the next mark, but usually hangs out littlebit after the middle. so what I did was let the run with the antifreeze res. open so it can get all the air out. which it did get better because before it was a tid bit worse. now if did that with heat on hi from the climate control the car would be fine. the car never drifts past the next marking after the middle. and also the oil temp hangs out in betwee 200 and 225. I did everything with the tb differnce was I used a behr thermostat instead of the wahler. but I still think I have air in the system. what should I do to get all the air out? or it isn't that what could it be?

2002 C5 A6 2.7T
Ming Blue Exterior / Cream leather interior
Audi Navigation RNS-E (converted euro Nav) - Bose Premium Sound - 10 speaker plus sub system - Cold weather Package
82,500 Miles
Performance: & Mods
So far... Forge 007P Diverter valves - Hotchkis HSport swaybar kit - Audi Navigation RNS-E radio - Audi OEM iPod kit - Audi RS6 18s
Adaptions
"01032" transmission code - "15981" door lock code - Display to reflect the Nav directions
What the warranty covered at 80,200 when i bought it:
New turbo setup, new cam seals, valve cover seal, front tranny seal, Secondary air pump, new tcm and harness, new electric secondary fan, transmission redone, new climate control fan. two visits - 3 weeks - cost me 2 deductables totaling $100. gotta love the CPO
What I have done so far:
Just did my Timing Belt service at exactly 84600 miles.
To Do List:
Giac chip - APR bi-pipe - PSS9s - RS6 brushed aluminum mirror housings - RS6 spoiler - Tinted Tails - Tints (35% rear window and back doors, 25% front 2 doors) - OEM RS6 modded exhaust system