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Discussion Starter #1
About a month ago my 2011 smart (30,000 miles) started making a strange sound, sort of like a sheet of metal bending and popping due to expansion. The sound seems related to temperature because it happens almost always near the same spot after leaving the house. I have also heard it as the car is cooling in my driveway and once heard it while washing the car, quite a while after turning it off. Some days there's no sound. I wonder if someone in the forum had had a similar experience with this curious sound. :shrug:
 
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