Mario,

Your problem could very well be the ALDA itself. It's rare
but they do fail. I actually experienced it once. I bought
an 83 300TDT a couple of years ago on a smoken deal.
Sometimes I get smoked on smoken deals,but this turned out to be a great car. At any rate my wife was following me in a
560SEL and couldn't understand my problem. I know a turbo 300 won't leave a 560 in the dust, but this wagon acted just as you described. When I got it back to the shop,I went down the list of valve adjust etc. Replacing the ALDA solved the problem.Good luck.

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