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Stan, Mercedes Technician
Category: Mercedes
Satisfied Customers: 3526
Experience:  Technical support engineer
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Stan is online now start.cold morning

Customer Question start.cold morning s ? but when started fine for rest of day have changed fuel line o.ring.s and filter,s and also fitted new heater plug.s still slow 2start first time in the morning ? any idea.s please
Submitted: 3 years ago.
Category: Mercedes
Expert:  Shantal-Mod replied 3 years ago.

I'm Shantal and I'm a moderator for this topic.

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Expert:  Shantal-Mod replied 3 years ago.

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Expert:  Stan replied 3 years ago.
Check the see-through fuel lines for any air bubbles. If there are, some o-rings or fuel filter or fuel lines from the tank are letting the air in. If the lines are perfect, next likely cause is one of the injectors leaking fuel into return too much. I suggest to have them checked at Bosch Diesel service center. They can rebuild them if found faulty.'