Ask a Technician2006 Mercedes C230 sport – > EVAP Canister Vent Solenoid Valve too noisy ? ?
Anonymous asked 8 years ago

I am getting a strange knocking sound in what sounds to be the rear passenger side. I will come to a stop and then a couple of seconds later I hear knock, knock, knock, knock, knock. It literally sounds like someone is knocking on on the rear quarter panel or something. Does the evap purge solenoid need to be replaced ?