I agree w/Gilly that the OVP is the place to look before anything ..
The old style [ which will give complaints such as yours] is part # 000 540 52 45[ Siemens ] has been changed to 000 540 67 45.
Also, next time you have a No Start, give the relay a tap and retry..
This relay is the feed for both the engine electronics and fuel feed systems. So power is monitored here before any ECU
controls or Fuel/distribution and fuel feed [ fuel pump relay].
Plus the originals were infamously faulty and good insurance to change out regardless..