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Originally Posted by Scott98
It's not all rocket science. If I needed an engine rebuilt then I would seek out a Mercedes specialist. But for everday repairs a highly skilled mechanic with access to service manuals should easily be able to fix most things on your car.
Scott
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Repairs with the service manual is the easy part. Diagnosis is what I am more concerned about. You can take any mechanic and they can replace parts. For them to diagnose why this is doing that is what I think is harder. For instance, Gilly is a qualified MB tech. I would trust him to work on my MB any day of the week. However, if he were to work on my GM L98 engine, he might be able to do some things but as far as diagnosis, he might not be the greatest. Given time, I suppose he could come to the proper conclusion but he might not know all the little quirks of this engine whereas, I suspect that drunk and half asleep, he probably would do a far better job on my MB than I could sober and alert. Are the principles the same? Sure. All engines are basically "Suck, Squeeze, Bang, Blow." Would he know that at idle the pulse width of a L98 engine should be around 1.6 ms? give or take 0.2 ms? Probably not. Given time, I'm sure he could figure it out. That is why I send my MB to him and my L98 to Hitechmotorsport or Lingenfelter.
In an old carbed car or in say a 103 engine, all it takes is a couple of meters. However, the more complex cars get, the harder it is to just use a DVOM and a dwell meter to diagnose everything. That is why i want my tech to be familiar with the nuances of the car.