Yeah i know, but some cars tend to be sensitive anywas ;P I have a LITTLE coolant leak on the right side tube for the car heater. But thats nothing more than a drop a month or something like that.
It's a 40v. Have changed timing belt and thermostat on a couple of A6 (c4) with V6 engine, and as far as i can see the front setup on these two engines are pretty much the same.
Regarding coolant change i really don't know if it's been done in the right schedule's since the car have two Service books, and they have been stamped and used totally random

So i think i'm going to take a BIG service with all items ASAP, have to get the front of to fix my Webasto anyways