I have a 1988 c230 with 73K miles. Car runs very well but it makes a noise amd i am not sure from where....its not easy to describe but here it goes..
its not a ping or a knock...its like a tapping noise and it starts once the engine warms up. it doesnt do it when i start the engine. it takes a couple of minutes. If i stand over the engine with the hood open it looks like its coming from the engine area but if I stick my nose under the car it sounds like its coming from under the car. hard to pinpoint. Opinions?