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#1
07-01-2010, 02:00 PM
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92 300CE Problem; starting and running
My 92 300CE is affected negatively by moisture. After a hard rain, it may be difficult or impossible to start, and then after starting -- if there has been a recent rain, it may start to run rough and then stall after reaching normal operating temps.
What connections or unit can cause these failures, which are linked to wet conditions only? Thanks for any ideas or solutions. Ben Carter
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Ben Harrison Carter 1999 Mercedes ML320 87K 1992 Mercedes 300CE 89K 1995 Corvette 29K -- Sold Dec 09 1989 Mercedes 420SEL 99K -- (Sold 4/08) 1968 Mercedes 230S (106K) (Sold 9/06)) 1976 Mercedes 450SEL 130K (Just sold - 06) 1961 Mercedes 220Sb (sold years ago) 
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#2
07-06-2010, 08:15 AM
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Ignition issues including; cap, rotor, wires, & coil are the most common problems under those conditions.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
07-06-2010, 09:04 AM
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300CE Ignition and running problems
Thanks for the tip regarding coil and wires etc; I will recheck these areas more thoroughly.
Ben Carter
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Ben Harrison Carter 1999 Mercedes ML320 87K 1992 Mercedes 300CE 89K 1995 Corvette 29K -- Sold Dec 09 1989 Mercedes 420SEL 99K -- (Sold 4/08) 1968 Mercedes 230S (106K) (Sold 9/06)) 1976 Mercedes 450SEL 130K (Just sold - 06) 1961 Mercedes 220Sb (sold years ago)
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#4
07-06-2010, 01:46 PM
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The most common
problem with damp starting and running issues is a cracked distributor cap. May be very hard to see. Look carefully and also look for carbon tracking inside the cap.
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#5
07-06-2010, 02:51 PM
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Where is distributor on the 300CE??
I think I have a solid state electronic ignition, but if there is a distributor cap -- where is it on the car? I know there are several electronic modules just behind the battery, but which one controls the spark -- The Engine control module, or another one?
Thanks for the help ..... Ben Carter
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Ben Harrison Carter 1999 Mercedes ML320 87K 1992 Mercedes 300CE 89K 1995 Corvette 29K -- Sold Dec 09 1989 Mercedes 420SEL 99K -- (Sold 4/08) 1968 Mercedes 230S (106K) (Sold 9/06)) 1976 Mercedes 450SEL 130K (Just sold - 06) 1961 Mercedes 220Sb (sold years ago)
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#6
07-06-2010, 04:12 PM
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All 103 engines have distributors. The distributor is at the front of the engine behind a black plastic cover. Very easy to replace. The KE Jetronic fuel injection control is one of the boxes you see behind the battery. The EZL ignition control is a flat module on the driver wheelhouse. The ignition timing is controlled electronically via this module. That's the only "solid state" part of the ignition system.
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