Found vehicle leaking engine coolant while parked in garage. radiator intercooler was at fault. if all or most coolant lost while driving at highway speeds engine may have catastrophic damage to occur with possible injury or loss of life. vw audi has known of this issue with the intercooler and has a protection screen (8k0-820-746-c) available for purchase. you need to force audi to have this item installed on all models affected before owner(s) cause an incident.