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E320 Bluetec S420
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125 Posts
Discussion Starter #1
So here is the problem, the car starts fine at operating temp and when its dead cold (overnight or after 6 hours), but when it sits for 15 mins to 5 hours (after 6 hours its starts fine) it takes like 5 seconds to start, sometimes i have to retry 2 or 3 times, What could be the possiable problem, Fuel filter, bad sensors, fuel check valve??? :surrender:
 

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E320 Bluetec S420
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125 Posts
Discussion Starter #2
anyone, i tired the search but no luck...
 

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W124
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4,830 Posts
I think the check valve would give you a problem after sitting overnight (cold start) Have you checked the air/fuel ratio adjustment? Could be on the hairy edge of lean.
 

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1995 E320 Wagon
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776 Posts
Just leave it on ON position for 5 seconds before you turn to start OR keep your foot on the gas pedal while you turn the key. This is a issue with lots of W124's.
 
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