When you pick it up, make sure you find out exactly what they did. Intercooler hose/clamp replacement or repair should be mentioned - be suspect if it is not. BTW, what was your build date? I am continually amazed at how many 320 owners are having this problem. Wouldn't it make sense to correct this at Vance and eliminate the warranty repair/tow payments. This has to be a major known issue for MB.
I'm still finding it hard to believe that our GL with less than 500 miles on it left us stranded on the way to a wedding. Thank God it didn't happen to my wife with our kids in the vehicle.
In my opinion this is a major safety issue that should require a recall. As you said boxboss, it is apparent that this a widespread problem. The sudden loss of power and ensuing breakdown could easily result in serious injury or death. Imagine making a left turn in traffic and having a sudden loss of power, or being stranded in the desert on a 100 degree day, or losing power in the left lane during rush hour, etc.
I bet if this were Toyota the recall would have happened weeks ago.
Between this problem and my transmission problem I am pretty down on Mercedes right now. Also, I still haven't heard back from Mercedes customer service after two conversations with their representatives and a promise that a regional rep or a manager would get back to me. It has been over a week.