Well I got a coolant leak somewhere on the S4. Last weekend when driving to Portland, OR. it started overheating when we were stuck in traffic. I come out to the garage today to find a big puddle of coolant on the floor and zero coolant in the car. Thank god my wife now works at my friend's auto shop... we will see what the issue is now.
Also, got a odd electric motor sound. Hard to explain but it sound like a electric motor running like mad. I don't think it is a bad turbo but something else. I hope it is not the Aux (after run) pump as I just replaced that last summer.
I'm sorry to say, but once the auto loan is paid off it may be time to find something that is more reliable. Seems the more I baby this car the more it craps on me. The credit card can't take anymore... if you know what I mean.
Update... So it is just a leak in the reservoir tank. So a easy fix with a new tank. Parts should be in tomorrow and replaced in no time. Likely time to do a coolant flush since it's mostly running on water.