Nah, I just stick to the facts which is specific parts and specific prices, a simple and straightforward way to evaluate whether someone has good prices.

Is this your review on yelp where you claim that his hourly labor rate is $50 and that a regulator for your 2001 E430 costs $300? http://www.yelp.com/biz/mr-mb-motors-tarzana

I just looked up the price on Fastlane and saw about $70 for the rear and $125 for the front regulator. I don't deny that Enrique quoted you $300 for a part that you can get for 3x less than that. He charged me $100 for brake pads which is the same price as the Dealer - but I'm not sure if they are the same quality as Dealer pads. Enrique claims that he bought the brake pads directly from the Authorized Mercedes Benz Dealer.

Here is another less than good review about the auto mechanic:

Well I read all the forums and there were years of raves about Enrique's fairness and his skills at his Reseda Blvd Mercedes shop in Tarzana. And, in the beginning, it was true. He would do little things, like change the poorly working antenna with a better one and not charge for it, transport your car to a test only smog place and give the car a tune up several hundred dollars less than most Mercvedes shop. And he is a genuinely nice guy. But since I first got the car he would egg me on about getting the transmission rebuilt and he would do it for a good price: $1500. So after a year or two, when the car begin stalling at traffic lights, I sprung for the transmission rebuild against my families' wishes. Afterall this was a car with more than 200,000 miles and 20 years old. But I believed it would make it a better driver and Enrique assured me it was worth it as the engine was Mercedes' best. But the phone call before I was to pick up the car said that he discovered other problems and that there would be additional $1000 to the cost. And it actually was $2600. And on the way home the car stalled at a traffic light! Back to Mr. MB Motors and he couldn't find the answer to the stalling problem. Not for a year and a half. It certainly had nothing to do with the transmission. A neighborhood mechanic changed the fuel filter and that seemed to work for a few months. Finally when it was time to smog the car, it went back to Mr. MB. When I picked it up after $327 worth of "tuning" he sat me down and said that the car couldn't pass a smog and that a cat converter may not even help and that the engine leaks oil and the wiring harness might have to be replaced and that I should cut my losses and get rid of it. Am I the only customer who took a beatiing at Mr. MB Motors of Tarzana? Mordecai F.
http://www.yelp.com/biz/mr-mb-motors-tarzana