The evaporator problem seems to be solved. It was a biological problem...it seems that there are little bacteria that eat alluminum... They now dip the new cores.
The engine has been upgraded in the area of the cylinder head. I have seen them go over 300k miles, but some not make 60k. I think it is in the service.
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS