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Old 09-02-2002, 08:13 PM
Posts: n/a
A/C Compressor Noise

Hello to all from a new user!
My '84 380SL has begun making a humming noise that increases with engine speed when the compressor is on. The air still blows cold.
I have been told that the Expansion Valve is bad, but wanted another opinion before taking it for repair. I assume, from the year of my MB, that it uses R12 refrigerant?
Thanks for any help and advice!
John Daly
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