Start/Stop Deactivated: Audi A3 2.0 tdi 2014
We have always turned the Start/Stop System off when commencing a journey using the button on the left of the console ever since new.
Three months ago the car would judder when apparently changing gear. ( the gear indicator would “flutter” ie D2 Judder D2 then D3 between any gears). There were no fault messages or any messages at all on the console

We took this to be a gearbox problem and had the gearbox oil changed a few weeks ago.

Recently we have had a failure to engage when pulling away at a junction with a heavy On/Off feel to the drive, which can be pretty scary.

Now, on three occasions, the engine has stopped running whist driving along. The gear indicator shows D only (no number) and we have then coasted to a standstill and restarted the engine by turning the ignition Off in Park and starting again. On the last occasion an instrument cluster told us “Automatic Start/Stop Deactivated: Please Restart Engine Manually! This is downright dangerous!

Can you help please!