Basttion

rear differential area turn dark like this?

Thanks,
<img src="http://pictureposter.audiworld.com/88983/under.jpg">

TTinCT

its a leak! ;-P

Basttion

Drat, my worst fears realized! )

Scenic Driver

Wow, you must work for Audi.

StartXJeff

I was going to say, "Dirt and Grease liberally applied over metal will do that"

Basttion

What's behind that bottom right screw? That looks like where it's coming from.

DasTT

Even if you just get the case coated and don't clean it off it will collect dirt. Mine did this after the dealer checked the fluid level at the 2 year service and "topped it off". The overflow coated the diff case. Mine looks just like that and it is not a leak. Clean it off with gunk engine cleaner and see if the road grime returns.

roadyTT

Leaning left to break wind...

(CHI) Mikey+

=)

Basttion

Thank you. Will do!