Audi S4 owners have reported 1 problem related to transmission gear slipping (under the power train category). The most recently reported issues are listed below.
Driving under normal conditions (~30 mph, city street) and the dsg auto transmission slipped from gear and gave a warning that there was a malfunction, no reverse gear available. After driving to the nearest parking lot to stop and try to diagnose, found research that stated the mechatronic unit in these transmissions are prone to fail. It appears that I lost half of my gearbox. R, 2, 3, 4, 6. After the car was able to sit overnight, the issue appeared to go away by itself, but a few days later, the issue happened again. I was driving about 45 mph on a city road. Same exact issue, lost half of the gearbox. I then got home and immediately ordered parts to attempt to rectify and prevent any further damage from happening to the trans. And then again, just the next day, it happened again. This time while driving ~70 mph on the highway. The vehicle just gave up all power and instantly dropped to about 55-60 mph ,in morning commuter traffic, due to being in a steep canyon. It took a moment before the car found a gear and gained power again. I limped the car to work and parked somewhere where I can easily move the car if the transmission is still stuck without half of the gears.
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