So, I came to an agreement with the dealer. They agreed to give a full refund for the valve body job and told me I can take the car wherever I want to (I still have not received the refund, I am crossing my fingers). They of course refused to accept any possible mistake(s) they might have done to mess up the transmission. I never said they did but it is possible. Can they prove they did not? No. Can I prove otherwise? No.
Last week, I went to pick up my car from the dealer to have it towed to my mechanic. It was funny that there were cables, transmission control module out of its place all over the passenger side's floor. I asked my SA, why it was left like that. He said the tech probably wanted to go into the computer and forgot to put it back. Then the SA put the cables, module back in its place. Btw, the second SA is an awesome guy. Anyway, I had the car towed.
Yesterday, the car had the replacement tranny put in. I bought a used one from LKQ with 6 months/6K miles warranty. Well, guess what! The car was still in limp home mode, check engine light came on with few errors. So, my mechanic checked it and he said it is probably the conductor plate on the new tranny or transmission control module is bad! I told him about the cables, module being on the floor when I picked up the car. He said he was not sure if that was the problem until he checks it with another similar car's module which he said may not be too healthy for a diagnose but it should give him a better idea.
Today, he called me. He said the module he tried on my car was from a 2002 C240 and after replacing it, all the codes went away. However, there is one new code which he believes because of the non-matching transmission and module. He believes 99% the problem is the module and I need a new one. Now, the module he said needs to be programmed and has to be done at a dealer. That seems to be the solution (at least for now).
Now, I cannot help but wonder. The very first time I took my car to the dealer, was it really the valve body needed to be replaced or was the module bad? If they misdiagnosed the problem, did this cause the transmission to go bad? Was the transmission really bad in the first place or maybe the module needed to be replaced only? My tech also said the transmission gave internal errors but was the errors there because of the bad module in the first place? Did they mess up the module when they were working on it (especially when they left everything out, you cannot help but think this way)? A lot of questions to be answered and I am sure the answers by both dealer and my mechanic are; we did not do anything... the customer is always wrong
So, this the latest update...