My BMW's gearbox is jerking in Sharjah traffic – any recommendations for a specialist?

I've got a 2016 BMW 5 Series that's started jerking between gears, especially in stop-start traffic around Sharjah, and I'm worried it's the mechatronic unit playing up. I came across https://gearboxrepairsharjah.ae/brands/bmw/ which seems to focus specifically on BMW transmission work, and I'm curious if anyone here has used them or knows of a similar specialist nearby. I've heard that for proper BMW gearbox repair Sharjah, you need a specialist with the right diagnostic tools who won't just recommend a full rebuild straight away. A mate recommended a place with German-trained technicians and transparent pricing, which sounds promising because I really don't want to be hit with surprise costs. Has anyone here had a good experience with a particular workshop in Industrial Area 4 or 5 that actually knows these ZF transmissions and can do a proper diagnosis before quoting? I'd really appreciate any honest recommendations.