There are multiple issues you might face with the automatic transmission in a Golf MK7 such as: clutch failure, leaking from the gearbox, or car jerking during shifting. Although the gearbox is proclaimed to last 90,000 miles, many people face problems with it at 40,000 miles or even 30,000 miles. So you will have to be ready to make frequent visits to the repair shop to fix these problems. At worst, you might even have to replace the clutch packs, which definitely will be costly.