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Ali:
I think he meant "how many" of them do it this way, not "how do they do it".
The only answer I can give is that all of them i used to work with did it that way. I am sure 90+% of them in a dealer are doing it correctly; MB really stresses this in training. The dipstick tool is really useless without monitoring the temp, and there is a very short window of opportunity to catch it at the correct temp. If you simply testdrive the crap out of the car, plug in SDS and the temp is way high, say 110C or so, which I have seen done, it's way way up on the stick, even though when it was brought back down (let the car sit shutoff for 1/2 hour or so) the level at 80C was found to be a little low.
Gilly
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