Hi Modrs, welcome to the forum.
The engine turning over without running suggests two possibilities to me:
1). Communications between the gearbox control unit and the engine control unit are failing. This will cause fault code 01314. Remove connectors from GCU and ECU (under the scuttle, remove wipers and remove plastic cover for access) and spray connections with switch cleaner. Take care with the cover as it is awkward to remove and easily broken. It might help if you leave the negative post of the battery disconnected overnight. Also make sure that drains at either end of this area are clear, because the windscreen drains into this area.
2). There might be a problem with the fuel supply. Have you changed the fuel filter since you bought the car? Get the fuel pump tested. Fuel pressure at 1500rpm should be 3.5barg - there is a test port on the pump.
If your clutch is original, it is probably not far off failing. If you have some adjustment (thread showing at the end of clutch cable) left the clutch plate is not the problem but the guide sleeve and release bearing will be near their end of life.
The Hill factor is an option for starting on hills but does not apply to a 3L, as far as I know. If you're tempted to change it, make a note of the original setting. Get your clutch actuators upgraded to the Hall sensor option - contact Mankmil on the German forum (a2-freun.de), English is no problem. This is cheaper than buying new actuators, which will eventually have the same problem.
RAB
Hello, Rab
When start-stop fails, there is no any faults in VCDS. GCU and ECU connectors has been inspected when i was spending a lot of time to solve all problems (RTMF12, incorrectly connected, gear actuator solenoid valves and g239/g240 sensors). there is everything in perfect condition.
All filters i have changed, and i don't think there is any problem.
I more and more looking on clutch actuator. Maybe start stop fails because GCU thinks, that cluth is not disengaged? As i wrote - in eco car stops, but when i release brake, starter gets very short impulse only (0,xx seconds max). and its not enough to engage starter and turn motor.
But today i discovered spring between holes, where is caliper. And its fitted to my last lupo, but not for that, which fails in start stop and which slips clutch. Should it be here?
next days i will install spring, check clutch wear with caliper(as in picture shown), adjust tension, re-adapt clutch
All my problems are because i have purchased cars, whos were repaired by totally wrong mechanics in totally wrong service stations. For example - not only broken plugs, wrong connected plugs, but also wrong assembled pistons, pinions, shafts, alignment betveen roker arms, levers and hall sensors etc. BTW i have totally recovered 3 lupos - 2 of them i own, 3rd is for my friend.