Gas leaking from exhaust pipe on Audi A5 Supercharged

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. The question is - what is leaking out the exhaust? Is it smoke? Is it fluid leaking out? If it is smoke, what color is the smoke? If it is fluid, can you capture a sample and see what it is? There are so many variables here - the vehicle sitting for so long, the rodent infestation, and wires potentially damaged. This will take some effort to figure out. It would be a good idea for the same tech who has worked on it to continue, but if you want to find another opinion at a shop near you, use the links below. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.