I have a 96 SL320 with 114k on it. When I rev the engine and it goes back down to idle, there is an interval when I hear a rattling sound. Engine performance is good, responsiveness is good, no problems with operations, I can only hear this when I am under the hood, not while inside the car. What should I check? I replaced the belt, tensioner pulley, and idler, and water pump, still a bit of a rattle. Timing chain? When I had the upper timing chain cover off, all looked great. Any help is appreciated.
Happy Benzing!
Brian