Found out today what the real issue is!
Thanks for you replies and good luck wishes.
I think I will need it on this one.
My mechanic opened up the valve covers and inspected the guard rails. He certainly believes that the engine has more miles than advertised.
I took the engine number and went to my local MB dealer and to my dismay it turned out that the engine has been replaced.
I asked the seller today and he now has no idea what and why the engine doesn't match numbers. Who knows how many miles this engine has one it?
Suddenly the perfect interior means nothing to me as the car is not original.
The mechanic in LA has taken this very seriously so far and I believe he will aid me in getting money out of the seller.
So far it is only words but he sound serious!
We will see.
I really feel taken on this one.