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Hard starting issues are almost always fuel pressure related.
System pressure can't bleed off & should be 85 PSI.
Also make sure that the over-voltage relay is good, and the secondary ignition system is in good condition as well.
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MERCEDES Benz Master Guild Technician (6 TIMES)
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44 years foreign automotive repair
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190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
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