Mercedes-Benz 300SL difficulty restarting in Florida heat, possible fuel line issue on Mercedes-Benz 300SL
Problem overview
Some Mercedes-Benz 300SL owners report experiencing difficulties restarting their vehicles in hot conditions, particularly in Florida, due to issues with the fuel system. These problems can stem from low fuel pressure leading to heat soak, which causes fuel to boil off in the injector lines and results in vapor reaching the engine during warm restarts. Additionally, some owners encounter vapor locking conditions when fuel boils without pressure, typically occurring within 15 minutes to an hour after stopping a hot engine. Other contributing factors may include bad gas, such as water contamination, or malfunctioning fuel system components like the pump, filter, check valve, or injectors, which can negatively impact engine performance and starting. It is recommended that owners inspect the fuel pressure, vacuum hose connections, and the fuel pressure regulator to identify and resolve any issues affecting fuel delivery.
Mercedes-Benz 300SL vehicles with this problem
Search for another problem
Ask our experts about your Mercedes-Benz.
RepairPal Car Genius™ is a free resource for vehicle owners seeking advice on maintenance, auto repair, shop inquiries, estimates, and finding a trustworthy repair shop in your area.
Call us at 877-913-1554
Available 9am – 6pm ET Monday through Friday
