Question about Mercedes-Benz 400-Class
It could be the air conditioning clutch going out. to check turn your car on and idle it with ac on and hood open. at the ac compressor it will have a pulley on it with a clutch that engages when the air conditioning is on. if it engages and disengages it can be the clutch itself has gone bad, the ac clutch will also disengage if there is not enough freon in the ac system, will also engage and disengage if the pressure gets too high in the ac system. Depending on the year of the vehicle it will disengage at full throttle and come back on when you are not at full throttle.
If it is a metallic sounding screech for example take a coke can and drag it across pavement kind of sound it could be a bad compressor or a bad ac clutch. If it is a more rubbery sound for example a car spinning its tires kind of noise it could be a loose belt.
1. Check to make sure all belts are tight under hood
2. start car and look at ac compressor to make sure compressor pulley is turning and that the fan clutch is engaged spinning
Posted on Aug 09, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 10, 2016 | Nissan Cars & Trucks
Jun 17, 2015 | 2006 Chevrolet Impala
Jun 16, 2015 | 2005 Toyota Sienna LE
Oct 14, 2012 | 2004 Chevrolet Avalanche
Jul 13, 2012 | Cars & Trucks
Jul 13, 2017 | 2005 Pontiac G6
Aug 14, 2010 | 2002 Pontiac Sunfire
Jun 19, 2009 | 2006 Chevrolet Cobalt
Apr 08, 2009 | 2001 Ford Windstar
Dec 30, 2017 | Mercedes-Benz S-Class Cars & Trucks
1,272 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: