Hi all, Forgive me if this has already been asked in the past, but I'm going around in circles trying to figure out which rear diff replacement to buy. I have a 2016 Octavia vRS 4x4 which had a failure in the bearings on the diff. I had the diff rebuilt by a VAG specialist about 18 months ago. Since then, I've moved 150 miles from said specialist and it has failed again. It makes a grinding noise, shakes at 70mph and I've discovered there's oil/fluid that has blown backwards from the diff. Rather than messing about taking the car back on a 150 mile trip and them worming out of any liability, I've decided it's just easier to swap the diff out with a different unit. I know the part number is 0CQ525010 but how do I know which revision letter to go for? The pic I managed to get from underneath the car only shows the part number above but no additional letters. Thanks in advance. Andy