The main unit of the car is the engine. How the engine works depends on car operation. If your car's engine is'n running smoothly, uses a lot of fuel, does'n start good, so about the comfort there are no question. And neither electric windows, heated seats will fix your mood. One conclusion suggests if engine starst failing, you should immediately consult a specialist.
But not always be "too be wrong," the car "mind" (PC), sometimes it is enough and easier way to diagnose the fault. For we have experienced professionals who use modern diagnostic equipment to quickly and accurately identify and solve problems.