Ringing Sound When Accelerating?
(2010-05-30 15:51:23) 1. Says: i have a s142. Says: Sounds like your car might be "pinking", which is the sound of the piston rings rattling due to fuel pre-ignition. Have the timing checked, and also the fuel you are using.However, it might just be a loose fixing under the bonnet. We've found hoses that have detached themselves from retainers, that are touching bodywork and rattling.
Might also be a broken heat shield on the exhaust or manifold. Tag: Ringing Sound When Accelerating?
