Suspension Noise problems of the 2011 Audi A8

Audi A8 has been using large amount of coolant. However, its not running out the car. Yet im steady buying coolant because its saying its low. And when I go to put the coolant in my car it is low. So where is the coolant going? in trying to figure out where my coolant was going or why was it calling for so much I did some Audi research on my vehicle and saw that it had a prior recall. I purchased this car over a year ago and the dealership didnt alert me of any recalls. I dont think my recall was fixed. Also theres been a lound noise on my suspension in the front of my vehicle on the right. I see Audi had many complaints on this issue. The car with arrows for my suspension stays on. Took to dealership to get it diagnosed. They cut the lights off from the dash but the check engine light is still on. According to the forums ive read these issues on my Audi are serious safety issues. There were no warning prior to the failures. I am really afraid to drive my vehicle because I dont knnow what or when if it will stall out on me in traffic or worse.