chrislambros

I’ve owned the vehicle for over a year (it was one of the last 2017s on the lot) ..

If the vehicle sits overnight, the startup is rough (idles up, then down, then Normal (about 800 RPM). Sometimes the vehicle will stall during idle-down. It has been this way (off and on) since delivery.

After nearly a month at the dealership, they can’t reproduce the problem. MB corporate involved, but they are siding with dealer (can’t fix what they can’t reproduce). I don’t seem to have a problem .. send the dealer videos, but that doesn’t seem to be sufficient.

Thoughts ???

COOPERDB

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Is the car outside at night or in a garage -

Do the same warm-up symptoms occur

during the warm summer nights of July and

August and the much colder nights of December

and January -

Has MB replaced the fuel delivery system -

What octane % are you running -

Does this happen every morning -

Some Vegas summer mornings are

80 degrees at 8am -

If you can provide more information

that would be very helpful -


Thank-You
D.B.


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chrislambros

Car is garaged at night and under a carport during the day (office).

Do the same warm-up symptoms occur during the warm summer nights of July and August and the much colder nights of December and January:
Yes

Has MB replaced the fuel delivery system:
No. However:
Local dealership has completed a compression test and a scope (per a recent work order) to check for compression issues, or leaky injectors

What octane % are you running:
91

Does this happen every morning - Some Vegas summer mornings are 80 degrees at 8am:
The problem seems to be sporadic. Can't consistently reproduce the issue, but when I can it seems to stick around for a while. For example when I picked up vehicle, it was doing just fine.


Thanks for responding & the discussion ...

COOPERDB

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I am going with some aspect of the fuel delivery system

being the problem with the warm-up situation -

I think that there is a problem somewhere in the

fuel delivery system -

By the time the dealership's service people are ready

to do whatever testing they claim they are doing the

car has already warmed up -

Something in the fuel delivery system is impeding the

flow of fuel during warm-up but once warmed up the fuel flows fine -


Thank-You
D.B.


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S63AMG888

iTrader: (3)

Being a 2017, does this car have any time been tuned ? Spark plugs been charged?