I pulled the hose off of the manifold & tested the modulator to the transmission. It held very good no leakage. I put a gauge on the port on the manifold where I pulled to test the modulator & it was very high. With it unplugged to test the modulator it made the engine struggle with it opened up. The transmission was went through by a very, very reputable transmission shop here not much more than 8K miles ago,they re-sealed it & several other things I was told by them. It was done by the previous owner before I bought it. The whole car only has in 80's on it, but I know that doesn't much matter on a benz. I don't have a pressure testing kit for the transmission yet. Thanks, for the reply!