So today I took my Audi A3 Saloon 2.0 tdi sline into the garage as when I stall the car the start stop functionality seems to stop working. So I stall, put the clutch down and in neautral and the engine doesn't start. Should it? A technician told me there is a 3 second limit and to get the gear into neatral and the clutch down before it required a manual restart with the keys. I think the technical is talking rubbish but I know little about cars. Anyone able to help?