Audi etron sportback lost power while driving on a busy roadway at 60mph. Car lost about 10-15 mph speed within seconds due to the vehicle weight. By the time the ‘drive system malfunction’ and ‘electical system malfunction ‘ warning lights came on I realized I could not accelerate, and and coasted to a stop on the shoulder over maybe 15 20 seconds.Was able to break and steer. After several restarts, drove some again, but same warning came on unable to drive requiring tow. 7 weeks at this point at Audi dealer service, no fix or diagnosis. The issue has been redemonstrated at dealership. Told it was ‘fixed’, picked up car, and 4 miles from dealer car shut down again /lost power at 45mph on a major road, and back to dealership. Apparently many similar reports of loss of power randomly with this error. Very luck to not have had a crash, injury, or loss of life either time. Obviously an issue to not be able to accelerate and randomly lose power and this if not already will lead to deaths especially at high rates of speed, congested roads, up hills or mountains, train tracks, when passing or merging, etc. No error code, so possibly other crashes were a result of this and no one would know, as multiple vehicles with same issue and random mileage reported on audi forums and nhtsa reports. Mine is at 35000 miles, no previous issues. Still under warranty. Audi TAC case supposedly created for audi engineers.