Well, put in new cables and made no difference to the hard start problem. So now I need to look into fuel related problems.

Did some research and found problem could be related to Cold Start Valve. I want to diagnose the Temprature Sensor but am having problems. According to the Manual the temp sensor on a 1988 190E 2.3 should be of a 4 pin design. However, on my engine it looks nothing like a 4 pin design. It has 2 poles and each pole has a round connecter attached to a single wire. Where should I measure the voltage on these and should I have the ignition on when I check voltage on the temp sensor? Any one know?

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190E 2.3, 1988