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SLK in brilli silver
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Discussion Starter · #1 ·
Maybe im just being paranoid but thought I would ask. When you depress the gas and the rpm start to go up I noticed at around 2k I hear like a sigh or a pssss sound from under the hood. I know this is around where the sc kicks on so I am just curious if its a normal noise. I also hear it other times if im idling through say a parking lot. The car is running very smooth, but seems not to get up like it used to, or it could be me just too paranoid to step on it too hard.
 

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99 SLK230 Sport
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818 Posts
i could hear this too but not too loud and lasts only for a 1 second or less than that.. while idling with the AC on it could be the clutch for the AC compressor that you are hearing..
 

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2000 SLK 230 LE
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196 Posts
i could hear this too but not too loud and lasts only for a 1 second or less than that.. while idling with the AC on it could be the clutch for the AC compressor that you are hearing..
I heard this as well when I picked up my car at the dealership. I asked the saleperson about it and he said it was the AC clutch.
 
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