Ok, took It back to the garage today, they confirmed that the alternator is charging fine so are saying it's the cluster. They managed to fix the ABS trifecta due to the steering angle sensor not being calibrated correctly! At least that is sorted... It's deffo already had a new cluster as mine is reading 157000 klms but the computer was reading 250000 klms!!! He asked if I wanted to have the cluster coded to the car but that would have meant my current cluster would read the true 250k, I told him to leave it. I guess I should now either leave the car as is or maybe source a new cluster, these are new from BMW here at $1300 but again, the new K's would read 250k or I could source a second hand one and have the tamper dot on...