Right, so on the way home, I noticed that the crossed out A did indeed come on when I pressed the brakes really hard, good.
From the car's menu I then clicked on the Start Stop Info and after a few messages which went away (windscreen could fog, cabin not in ideal temp etc.) the only message left on was "high power consumption". Now I didn't have anything unusually power hungry on, I even turned off Clima and the stereo but still, the message did not go off for the remaining 15 minutes of drive. This is definitely not normal.
Plugged the OBDEleven in, checked "battery charge status" and it showed 54%
That's pretty low right? Could a low battery be related to the car always finding it's not having enough power to engage start-stop?
Bit of extra info:
Around 1.5 years ago I forgot to de-activate OBDEleven during the night which left the CANBUS busy for around 12h and me waiting for road assistance to come and charge the battery as nothing would work (had to unlock car by physical key and the dash was a true error-fest). After that incident I remember that it never showed over 70% charge and even after long drives when it would hit 85%, next day it would be down to 65%. But never as low as 54%.
Guess the inevitable is on its way? Anyway, went and bought a DEFA SmartCharge (the smaller 4A model) and left it charging just to see if this will cure the "high consumption" message even temporarily. I wanted to buy a charger since a long time just for being able to play with VCDS mods in my garage without having to worry about battery dying on me again so there I got the excuse. Thoughts?