Hello Hienz, I admit I’m still a bit confused by the explanation of what to do next , so
1. You disconnected the switch - no stuttering but gradually worsening performance
2. Reconnect switch- stuttering still there- switch is faulty?
3. Bypass the switch - stuttering is gone, car is healthy?

So you are driving with the circuit constantly connected (as if never using the brakes) and the car is working perfectly ( over how many kilometres?)
Surely this means that you are gradually confusing the ecu again?
It seems that you have a faulty switch (and so do I!). I tested mine and it seemed to be working, but the fault was intermittent. Did you test yours?

I am going to order a new switch from Melvyn. I will try the car before and after I fit it, and compare.

The saga continues!!!!

Last edited by SFG; 17/04/20 09:04 PM.

SFG
2012 4/4 Sport