I have just spent upwards of 2K on my R reg A4 1.9 turbo deisel due to Oil in the water. I am at my wits end as the problem is still there. After numerous google searches I came across a post on another forum that suggested it may be down to a faulty Oil Cooler (the bit where the filter screws into). The garage that has carried out the repairs seem to dispute that this could be the problem. Have any othre A4 owners experienced this.