1990 300 te 4matic supsension valve

[louzbenz904x4]

I have a 1990 300 te 4 matic , and the rear suspension has a leak ?My technician informs me that it is the suspension valve is leaking .
I am looking into a replacement parts and the MB dealer has one @ $650 CAD... I am hoping to source a used part .
I was hoping to query the forum here to see if anyone knows if the suspension valve is a common between the 300 te base model, and the 4 matics?? I have reviewed a few parts websites and notice the same part #s for both models, as well as the 560 se models...?
Any type of confirmation as to if they can be interchanges will save me lots .. .i can get a used 300 te wagon complete for the price of a new valve!
I am hoping to keep this car goin... as i have divulged TOO MUCH $$$$ to scrap this car...please help!