Mercedes SLK200 Kompressor R171 erratic idling

[ingluca]

Hello guys, I have a problem with this Slk to a friend.

The car is the 1.8 volumetric 163 HP 2006, and has erratic idling and light-MIL on and fault codes of misfire, mapping GOLD.
Were replaced the 3 tubes vapor recovery oil including the one-way valve in that tube in the middle was cut (default is typical), but in spite of this defect is not resolved.

I checked all the hoses for possible further aspirations of the air, but not find anything.

With the diagnotico Mercedes were controlled dimmers, learning of the butterflies, the recovery of the controller and adaptation octane number (up to 89) but without resolution.

The first of my interventions had been changed the spark plugs (2 times) and a coil.

Latest info, the intake manifold pressure at idle is 0.6 bar, which to me seems high, I would expect of 0.2-0.3 but I do not know this car, and I don't know if it can be normal.

Advice??

Thanks to all!!!

[Alfiuccio]

check carefully to see if it is sucking in air somewhere