I've been having this ongoing issue with my German sedan where the start-stop function just refuses to work and the air conditioning seems to struggle when the car is idling, and after doing some research I'm pretty sure the auxiliary battery is the culprit because apparently it handles all the secondary systems when the engine is off. I live in Khalifa City and I've been trying to find a place that can sort this out without charging me a fortune, because the dealership quoted me an absolutely ridiculous amount for what is essentially a small secondary battery that probably costs a fraction of that price if you buy it yourself. The problem is I'm not confident enough to do it myself because I've heard that these batteries can be tricky to access and you need to make sure the computer recognizes the new one, otherwise the car throws up error messages and the start-stop still won't work properly. I was searching around and I came across something about Affordable auxiliary battery service in Khalifa City, which sounds perfect since it's right where I live and I really don't want to drive all the way across town with a car that might stall on me at any moment. Has anyone here had their auxiliary battery replaced in this area recently and can tell me if the service was good and whether the pricing was reasonable? I'm particularly keen to know if they actually knew what they were doing with the coding side of things, because I've heard horror stories about people who skipped that step and ended up with all sorts of electrical gremlins. Any honest recommendations from people who've actually had this done would be massively helpful right now.