Limp mode. 10-15 min in to driving every time. New OEM switch. No change.
Oil and filter are good and new. No check engine lights. 4k rpm max limp. OBDEleven says it’s OPS3.

Problem is,oil leak in automatic gearbox pressure pipe, how to solve

I have an oil pressure sign on the glow plug sign is flashing the ESP warning is on. I've been losing power every so often driving and today I was over taking and all the above warning lights have come on.
I pulled over turned car off and waited when I went to turn car back on it took a while to turn over and start, I wasn't far from home so I turned round and headed the 15min drive back half way hm battery light came on as well and car died so I waited and got it going again it took a bit to turn over. I got home its booked in with an Audi garage tomorrow but being a girl I would like a rough idea of what's going on any ideas thanks