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the Service Bulletin yo mentioned was for the v8 only. It said to replace the computer giving me the #19 code with another one with a different part #.
I found someone on this forum who had the upgraded chip, so we copied it and placed it in my computer. It solved the problem, as the only difference between the 2 computers was the software on the chip.
Anyway, if there is a newer version of the 94 E420 computer, maybe we can grab the chip from it.
If you get a chance, send me the BOSCH and Mercedes part number from your computer. Maybe we can see if the 95 had upgraded software that we can test in your car.
Just a thought.
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