hi i got a soda superb at start of year and had problems with 12v not charging although seemed to run perfect , but got it to garage for checking and explained i had flickering headlights , heated seats were just lukewarm and they told me it failed the battery test and replaced battery , fast forward to last week and on every start up is told me 12v low drive to charge so booked into auto electrician and got it back friday morning with a new alternator fitted ,

drove from edinburgh to siloth yesterday morning all was perfect , coming home partly in the dark daughter kept asking me to turn on my headlights but they were on ! i struggled , got out the appeared to be on but dim and flickering / pulsing don't ever drive in the dark usually as dont like it anymore i'm stumped as what is going on , and regens are frequent for few weeks also now and done a 300 mile round trip no issue to pull into my street at midnight and it start a regen i don't know what to do anymore

Strange indeed, but I think you need again a good look and diagnostic at the charging system, alternator (how much is pulling out and wether the rectifier - that the word in English? - is working), also do not discount that even the battery you replaced was ruined by the failing alternator during the time between replacement of both.

It would be also worth checking if the BMS - Battery Management System - in the car is working properly (but for this you need to have a diagnostics like VCDS or OBD11), and wether the proper type battery and size was correctly installed and coded in the system.

Do not exclude anything, unfortunately. Do not rule out anything, at least at this stage.

Once more knowledgeable on the problem, is easier to take measures ...

thank you for replying , the car is going back to the auto electrician next week so hopefully he can get to the bottom of what's going on with my lights at least for the meantime .