Coolant coming out the radiator cap but not overheating

Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your vehicle. If coolant leaks from the radiator cap after you shut off your SL2, the cap itself may be faulty or worn out. The radiator cap is designed to release pressure at a certain point, but a worn or damaged seal can lead to coolant escaping too soon, even if the car isn't overheating. Another possibility is the radiator neck is cracked or damaged, allowing coolant to leak out. If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!