Sharjah BMW owners, where do you get your cars serviced?

Recently moved to Al Nahda and my 3 Series is due for its major service plus a couple of things I’ve been putting off, like the brake fluid and a weird vibration at idle that’s been bugging me. Back in Dubai I had a garage I trusted but driving all the way there for every little thing isn’t practical anymore. I’ve been told there’s a leading BMW maintenance garage near Al Nahda, Sharjah that people in the area use, but I don’t know anyone personally who’s tried them. What I want to know is whether they handle diagnostics properly because the idle issue could be anything from a vacuum leak to ignition coils, and I’d rather not play parts roulette. Also do they use genuine parts, and is the pricing actually better than the dealer or just slightly less painful? If anyone’s got a long term relationship with a garage in this area, I’d love to hear about it before I commit.