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hi there...would like to seek some help from you all out there..currently im repairing a ml63...engine vibrate during idling, after carry out some diagnosis,i noticed that the fuel system seems to have a problem, the fuel pressure is not maintaining during idle....the secondary winding for the ignition coil is around 8-15kv and fluctuating....need help from someone out there who experience this problem...thank you.
 

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Intake manifold gaskets can leak on these AMG motors causing idle fluctuations.

I've had mine done under warranty.

long shot but worth a look.
 
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