On Tuesday the car battery died it is 6 years old so not surprised on coldest day it gave up! Car is 2.0 diesel sport DSG so £100 not bad. But all is ok except now got engine management warning light on. Is this because it was so dead everything is reset and it will go out once it's done a few miles or is it just start of another problem... Clearly thats not easy to answer. So does a change in battery trigger this? If it stays I guess I'll have to get error code read and diagnose the issue.