Actually it is going on a Porsche but the information I have is the MAF sensor I have was used on a 92-93 S500 Sedan and a 94-99 S500 Coupe. M119.970-140.051 and M119.970-140.070
The information could be inaccurate though. It is a Bosch #0986.280.121 (old number 0.280.214.004). I think I identified pin #5 as power and pin#1 as ground but I am not sure about the other three. I am needing to hook the unit to a Link Intercept controller with the package replacing the old air flap style air flow sensor. Thanks a bunch for your help, Doug