My mom has a 2002 Mercedes CLK 320, and a few weeks ago a rattling sound
started coming from underneath the car. It's mainly audible when the car is
idling in Drive or as it starts to accelerate. I checked underneath and the
rattling is definitely coming from one of the two catalytic converters
located near the center of the car. All the mounting bolts are secure,
nothing seems loose, and the two cats aren't banging against each other
(even though they're less than a millimeter apart). It seems like the
rattling is coming from deep inside one of the cats. Any suggestions on
what could be causing this, and if there's any simple solution to stop the
noise? Thanks in advance!
"I don't mind what Congress does, as long as they don't
do it in the streets and frighten the horses."
-- Victor Hugo