[QUOTE=jriewer]I also hear it after I have pulled the car into the garage, turned the key off and am walking out the garage door.
I haven’t looked under the car yet, but my suspicions are its brake related.


I'm curious as to how a cars brake system could emit a popping sound with the vehicle at rest and the engine turned off?

I would be more suspicious of the exhaust system..ie..catalytic converter.
Some kind of "heat soak" if you will in the exhaust system.

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Mike Murrell
1991 300-SEL - Model 126
M103 - SOHC
"Fräulein"