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Old 09-03-2007, 06:34 PM
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Join Date: Aug 2007
Location: Houston TX/ Kent England
Posts: 46
560sl A/c

When I first start my 560SL I notice sound like bellows operating. If there are bellows (or something similar) in the A/C system does anyone know what they're made of, the noise is like a dry crackle. I was wondering if this is normal or I should do something to lube the system, the A/C works well and blows hot and cold air as required. I would rather do preventative maintenance than keep replacing parts.

I am using the A/C in auto mode if that makes any difference.

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Old 09-03-2007, 08:28 PM
Join Date: Oct 2004
Location: NC
Posts: 3,011
Sounds like your actuators are just in motion at first start. The good news is they work. You will find that the AC system is probably the area that will give you the most trouble as a 560SL owner. You will find the actuators you are hearing are prone to trouble and replacement requires removing the dash. This is a very expensive and difficult job and unfortunatly there is no preventive maintenance on these, They are totaly inaccesable.

Just remember what I said about age. The first time this or anything requiring dash removal happens to you replace all 7 vacume actuators as well as the little temperature sensor hose and anything else you find going astray. Then you will be good for another 20 years.

Other AC problems are the pushbutton unit. Expect to replace (or repair if your able) that every 3 years or so.

Dont let me scare you. Aside from the AC the rest of the car is bullet proof.

John Roncallo

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