Ok, I am new to the diesel world and I have read almost all of these threads, which are really helpful! My question is, how do I find the correct turbo model? For example if I wanted to get the Mercedes replacemnt Airresearch turbo, how do I know which one is correct? When I search on ebay and/or Google 20 different turbos seem to come up. How do I know which one is the correct one to buy? Thanks for any advice, yes I am new to all of this. On a side note I am also looking at the HX35W possibly. Not sure how to find the correct one of those either. Thanks for any info on this.