loud Hissing/Whistling sound

Asked by Andrea Dec 26, 2019 at 09:19 PM about the 2001 Mercedes-Benz C-Class C 320 Sedan

Question type: Maintenance & Repair

My car is OFF. It has been off for 2 days. There is a very shrill hiss coming from
the right side behind the wheel or under the passenger seat on the outside of
the car. AGAIN THE ENGINE IS NOT RUNNING while this is happening.

1 Answer

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