Had 1st B service last week , dealer said while its here we'll replace i think he said relay, as its on recall, when I asked what it was for, he was a bit vague, said it was in the boot, and I probably wouldn't notice any difference, it was electrical they did it, and he was right, I haven't noticed any difference, but its been done. I do have an aux battery in the boot, which was replaced under warranty last summer, less than a year old, so perhaps something to do with that.