This is my first audi and first turbo car so what I am saying may sound crazy so I'll attach a pic. I have a 2004 audi a4 1.8t quatto (amb) with a slow coolant leak, fill every week or two. I started looking around and found that on the passanger side, between the cat and the turbo there is dried up coolant. There has never been a puddle. I am curious the cause of this and how serious it is. Also I am having a number 2 misfire. thought I would throw that in there not sure if it is connected