MERCEDES BENZ IGNITION

Hi! My Car Has The M272 Engine (3.5l V6), And At Idle (around 650rpms) The Timing Advance Is Between 12.50 And 18.50 In A 30 Sec. Lapse...

It Never Worked Well. It Seemed To Go To 3 Cylinders From Time To Time. At The Time, The Minimum Wasn't Right. One Day, After Half An...