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Old 05-03-2006, 09:49 PM
Strider's Avatar
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Join Date: Sep 2003
Location: Washington
Posts: 83
Getting harder to start - '91 W124 300E

My car is getting a bit harder to start in the morning. I haven't been driving it much lately, but my wife informed me. It used to start easily within 3 seconds of cranking, and as it cranked, it built up speed until it caught and started and ran fine. Now its taking from 3 - 5 seconds to start, and it acts like its going to catch, then doesn't, then catches again and runs...

I'm thinking...Ignition? I replaced the plugs last year, but never replaced the rotor, cap, or wires. As far as I know, they are originals.

Anything else? Fuel filter maybe? Once its started, it seems to drive and run fine, like it always has.

This hasn't become a problem yet, but it is a change in the performance of the motor that I want to monitor and address before it gets any worse.


On the plains of hesitation bleach the bones of countless millions who at the dawn of victory, sat down to wait, and waiting -- died
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Old 05-04-2006, 04:18 AM
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Join Date: Jan 2005
Location: Jacksonville, FL
Posts: 73

How many miles on your car?
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Old 05-04-2006, 05:29 AM
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Join Date: Jun 2004
Location: Bali, Indonesia
Posts: 200
Originally Posted by Strider
On the plains of hesitation bleach the bones of countless...
...300E owners dealing with their fuel injection systems

Fuel filter, idle mixture, cold start injector, crap in the fuel lines, old plugs, corroded distributor contacts...
1987 300e manual 250,000 km (sold)
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Old 05-04-2006, 07:27 AM
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Join Date: Mar 2006
Location: Scotland
Posts: 143
I think you know yourself what is needed, distributor cap and rotor to start with then plug leads and fuel filter should have it starting and running sweet again.
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Old 05-04-2006, 07:31 AM
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Join Date: Dec 2002
Location: Fairfax, VA
Posts: 520
how about the battery?
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Old 05-04-2006, 08:44 AM
Join Date: Oct 2004
Location: Johnson City, TN
Posts: 985
These cars require periodic maintenance. To the above list, I might add the fuel accumulator. There is a maintenance schedule for your car. If you don't follow it , you will have problems.

Mileage would also be helpful.


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