Starter Solenoid problems of the 2012 Mercedes Benz E350

The cam solenoid sensors are picking up oil, then it is being disbursed in to the electrical systems of the vehicle. It is flowing into, O2 sensors making the vehicle run in a full rich mode, it is reaching the computer system that runs the entire vehicle. This repair can cost upwards of $8000. I have done online research and it is a very common issue amongst many mercedes vehicles. The issue is a known problem, it was being repaired but mercedes stopped the repair. It comes from an internal issue, not a fail to maintain problem. I contacted mercedes, they say they don't know of the issue, but they did tell me, they know how to fix the problem for a cost of over $ 5000. To us. Online searches have resulted in many complaints by owners. Regular driving is a result of the issue. Now we can't drive out vehicle due to fear of the oil in the electrical lines reaching our cpu for the entire car, which will result several thousand more dollars on top of the repair cost. We have paid $ 800. At this point only to be told, do not drive the care or worse damage will occur. So we have a beautiful car that is collecting leaves and dust. I await your response, garyw. Smith. We contacted mercedes bens of raleigh nc, they are our contact point, they don;t know of an issue but know the cure for $5000. Plus dollars, hmmm, curious. . .