2012 SD4 Dynamic Lux
I was changing the pollen filter this morning and for the first time I noticed the auxiliary battery under the dash. It’s basically a tiny sealed lead-acid battery. I think it’s something to do with the gearbox. Anyway, it’s no different from a house alarm battery and if it’s anything like mine, at 8 years old it should be near to the end of its life. I’ve just ordered a new one from eBay, just under £12 and I’ll replace it just because........ Has anyone else changed theirs as a preventative measure?