Have you tried jumping it with leads to see if it your battery, I was sure it wasn't my battery and it turns out it was, didn't help that the king lead was arking also
![rolleyes :rolleyes:](https://www.golfgtiforum.co.uk/Smileys/modern/rolleyes.gif.pagespeed.ce._1-AYLAFoI.gif)
Jumped it with X5 today still struggled to start for a good few turns but turned much quicker, try it and see, I feel a right plonker after putting my life on it that it was not the battery
Starts like a dream now as I had the starter motor refurbed anyway cos that was damaged also.....
Good luck mate