Hi guys don't know if this is the right place to post this. I have a 2015 face-lift Audi A6 Avant BITDI with the 8 speed ZF gearbox and I would like to get a proper gearbox service done (full drain including oil inside the torque converter too). My cars mileage just reached 60k. I average 40-50k a year and planning to keep the car for 5+ years. I live around North London and wanted to find out if there is a reliable gearbox specialist that does service on these boxes. I am willing to travel as long as its not too far. Any recommended places? Many thanks.