So my Q7 might be in the fritz......started on a trip home from the beach, the glow plug light was blinking for the second half of the trip..and then car started not allowing me to turn it off, and showing a transmission error. Had an oil change and that stopped ( weird) but the glow plug light won’t stop, and I get the small white gear warning light, which means it wants out of sport mode..I am at a loss, no codes, no engine codes, nothing.,,what should I start doing to check this out? Still have the diesel warranty, but not sure if the tranny is covered. Going to drain and flush fluid (I am at 108k miles)...thanks for any help..