Thanks for your reply 97 SL320. I did not check the coils for short to ground. Ill do that. I do have access to a wiring diagram and have been looking it over but have not found a common point. I did look inside the ADS N51 control module thinking I would find it full of oil or something similar to what I found in my 1999 E320 transmission control module, but it was perfectly clean and dry. It looks brand new inside. One thing to mention is that the wiring harness was slightly oily and i did notice a tiny drop of oil on a couple of the pins when i disconnected the module. This led me to disconnect the wiring from the damping valves and this is what I found on the drivers front.






So i am definitely going to replace that leaking damping valve, but the question is, could that valve have caused the fault codes for the RF and LR also? I am tempted to just replace that LF valve and see if the other codes resolve themselves. What do you think?