Question about 2003 Mercedes-Benz M-Class

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Noise from the lower vents

As of monday been experiencing a 4 second pffffffff sound coming from the lower vent next to the brake/gas pedal. The ac/fan is not turned/turned on when this occurs and it also occurs when driving about 5-10 min intervals of 4secs. pffff sound. could this be that my freon is almost out? Please advise asap. Thanks

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For sure check level of freon

Posted on Mar 06, 2010

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