Steve. Thanks for the info. Just out of curiosity, what does the AC oil look like? The reason I ask is if I remove the front carpets, beside the trans tunnel there is a sticky brown substance that looks similar to spilled coffee. I know some Benz`s have problems with their evaporators leaking. Is the 190 prone to this problem? Any idea what this brown substance could be? It doesn`t come up with paint thinner. As always, Thank you. Tinker