sump

Hi all, I would like a solid response from someone that has removed the sump from their a2. How many M6 bolts have you take off. I can only measure 18 that I have removed whereas the parts diagram lists 20. There appear to be another two right next to the flywheel but I cannot fathom how one...

I've noticed a few drips of oil coming from the undertray. Jacked it up and removed the drivers side wheel and could see that the undertray is wet around the sump area. In fact the sump itself is quite manky but the block upwards is dry. The sensor at the bottom of the sump and its wire are very...