Hi, I'm rpwats. Just joining Mercedes Benz Forum. I own a 96 C280. Having issues with central locking system. Bought my C280 in 2002. Everything worked well until recently. I am convinced that I have a vacuum problem. I can force it work electrically until the engine is started, then it will not work. I don't know where to look for obvious leaks also not sure if I have the vacuum lines connected correctly at the pump in the trunk.
Any suggestions would be greatly appreciated!!