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#2
08-30-2014, 12:15 AM
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I am not sure on that particular model, but on most cars when you run the AC, the idle gets kicked up a little.
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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12 1982 380SL 1978 450 SEL 6.9 euro restoration at 63% and climbing 1987 300 D 2005 CDI European Delivery 2006 CDI Handed down to daughter 2007 GL CDI. Wifes 
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#3
08-30-2014, 09:54 AM
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I know nothing about that model, but on some cars, the timing gets retarded at idle for emission reasons. But with a/c on this doesn't happen perhaps because load slows engine down. Dealer or good MB mechanic with proper equipment should be able to diagnose.
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Graham 85 300D  ,72 350SL, 98 E320, Outback 2.5
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can't get right
Linear Mode
