should i wire it in series or parallel?

But the Bosch sensors are a dime a dozen in the junkyard. I would get one and play with it first. You have two sensors in any modern audi, so you are probably wasting your time. Get a vag-com and you can log exactly what they are seeing.

if your interested.<ul><li><a href="http://forums.audiworld.com/a4/msgs/1010715.phtml">http://forums.audiworld.com/a4/msgs/1010715.phtml</a</li></ul>