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#1
06-11-2007, 02:05 PM
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Advice on A/C and central locking system
Last year, the A/C on my 1986 560SL did not seem to cool as well as before. The compressor was working. I took it in to the shop and had the coolant recharged. They put a dye detector in the coolant. After driving the car, I took it back and they could see no obvious leaks. The A/C cooled pretty well the remainder of the Summer. This year, same situation. I have had the system recharged and it is still cooling but the air is not as cool as when it was first recharged. Any thoughts on this? Also, this past weekend, the central locking system activated with the car unlocked in the garage. After trying several maneuvers and looking at the owner's manual (no help), I removed the fuse for the system. Has anyone had this problem. Any ideas on the $$ for repair?
BA 
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#2
06-11-2007, 04:57 PM
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Its obvious that you have a leak in the AC system. Have it located, repaired and refilled. Problem should be solved.
As far as the locking system is concerned, there are a number of things that could cause the problem. It could be: the pump electronics (inside the pump), switches located at the door locks, shorted wires, and probably other things as well. Its impossible to estimate the costs to repair unless the problem is known. Take it to somebody who can diagnose the problem.
__________________
I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k
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#3
06-11-2007, 08:58 PM
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I'm willing to bet that in usung the dye they dident check the expansion valve or anything else under the dash. Find someone who has a gas leak detector and get a second opinion. Also are you using R-12 or R-134. One of them leaks more than the other I forgot which.
Your cantral lock, I can only think of a faulty swictch or shorted wires. It's going to be difficult to find if it doesnt do it all the time. John Roncallo
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#4
06-12-2007, 03:09 PM
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Is this SL's locking system electrical? I thought they were all vacuum.
__________________
" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century  OBK #55 1998 Lincoln Continental - Sold Max 1984 300TD 285,000 miles - Sold The Dee8gonator 1987 560SEC 196,000 miles - Sold Orgasmatron - 2006 CLS500 90,000 miles 2002 C320 Wagon 122,000 miles 2016 AMG GTS 12,000 miles
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#5
06-13-2007, 08:06 AM
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It is electrical over vacuum. Electrical as the control portion, vacuum as the actuator portion.
__________________
I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k
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