My Copra is now 4 weeks old and on 1000 miles.
I still maintain that this Copra is far louder than my 66 plate
290 black edition. Either I had a unicorn 290black which was very quiet, or my Copra is the exception to the rule and is very loud. When warm, my 290black with start-stop would be silent when starting back up. My Copra when starting up again gives me a deep grumble and burbles; note - both cars had the soundaktor unplugged.
I posted a thread a while ago, where another user commented they'd noticed this strange behaviour also. Please do not get this confused with turning the car off in cupra and it still showing cupra mode when you turn it back on, but it's actually in comfort. This is nothing to do with that.
Sometimes when the car is on in cupra mode, it will decide to change mode back to comfort itself, but still show in cupra mode and stop the exhaust crackles. Once you change driving mode out of cupra and back into it, it will start crackling instantly again. This is NOTHING to do with gearbox mode either. I have extensively tested this with the following results.
My drive home from work is 10 miles, there is a long straight road out of the industrial estate I work in. I always put the car in cupra mode when I get in. Along this road, the car crackles and pops happily. I then drive my 10 miles and when I get into my housing estate, I sometimes notice that the car will not crackle anymore. I reverse up to my garage to enhance the noise, door open, 3k RPM overrun, no crackle. Change to comfort, then back to cupra and it'll crackle like a maniac.
Whereas other times, exactly the same route and conditions, I get home and the car is still crackling right up to my house. The other user in my thread said they'd noticed it after a few times the car does start-stop. So I made sure I disabled this on startup. Still, sometimes the car will refused to crackle after a while driving.
I have tested this in D, S and M gearbox modes. When the car decides it's not crackling anymore, no matter what mode and what RPM you take it to, it will not crackle.
This happened again yesterday, a 30 mile drive, car in cupra and popping happily at the start. I get home and hadn't stopped except from at traffic lights and roundabouts; car was always left in D, never put in N or P, and the car is refusing to pop. Change mode, then back to cupra and it's popping like crazy again.
It's extremely infuriating and the only thing I can think of is that some 'condition' is triggered where the car shifts back to comfort for emissions reasons.