I've got a 2011 Audi A6 with the multitronic CVT that started slipping and jerking at low speeds, and a garage in Dubai told me straight up that it needed a full replacement for nearly 12k. I nearly cried because the car isn't even worth that much anymore. A coworker who drives an older A4 suggested I look into an Audi Automatic Gearbox Sharjah Repair (http://auditransmissionrepair.ae/) shop because they often do partial rebuilds or valve body fixes for a fraction of the price. I found one with decent reviews, took the car there, and the guy diagnosed a worn steel belt in just an hour. He replaced the belt, cleaned the valve body, and did a full adaptation for 4,200 dirhams including a three-month warranty. That was two months ago and the gearbox has been flawless since. I'm so relieved I didn't scrap the car or pay for a full replacement. If you're in a similar spot, don't let the first quote scare you into giving up on your Audi. Just make sure you find someone who actually knows these CVTs.