Haha, improper maintenence has nothing to do with it. The 1st gen c-class is wonderful to drive but a mechanical nightmare nomatter how well it's been maintained.
I think you call maintenance to just changing the oil. I am very confused reading about how complex MB are, and realizing it just means I cannot afford fixing and upkeeping them.
Example: There is an integral marriage between electronics and mechanics, but I am not sure how many shops understand the interrelation. If the scanner tells a mechanic to jump in the lake, he dives. If the programmer and electronics specialist has to pursue the diagnostics toward the scope of mechanics, he says he would drop the ball. For crying out loud, it is an intimate interrelationship not two isolated items within a body. So until this interrelationship is not faced by teamwork, if one person does not cover the whole scope, the problems will coexist. It is like receiving a trauma patient with a bullet in the head and one in the liver: you need the intercooperation between a Trauma Specialist, a Neurologist, a Brain Surgeon, a Gastroenterologist, an Abdomen Surgeon, and an Internist. In our case, the Trauma Specialist is the Service Writer, the Neurologist the Electronics Specialist, the Brain Surgeon the Electrician, the Gastroenterologist the Master Mechanic, the Abdomen Surgeon the Specialist in that area (e.g. drive train), and the Internist the Shop Supervisor.
That is team work and it is not cheap. To this add honesty and customer service with a smile and every
car and owner would be happy.