I've got this 1994 C180 which has this rattle which is there one day and not the next. Its intermittent and sounds like something loose like hoses, wires or brackets or even washers or screws running around somewhere in there. Seems like it would be almost impossible to isolate where it is as the noise comes only when the car is moving not at idle. Is this a common problem with older Benz cars, anyone? What can I do without having to climb into the area while the car is moving and listening or putting a stethescope in a few places to find the loudest and closest spot. This would be almost impossible as the noise in the engine bay will drown out any of this. Please help if any of you can come up with possible culprits and most likely spots, thanks.