Little by little I have been getting my m103 back into good shape.



I went today to check the duty cycle on the x11 port (pin 2 and 3). It is setting at a constant 100% cold or hot.




Whats the deal?


I do have a pinhole leak in a 4matic line so I have it in bypass mode.


1991 300E 4matic M103 3.0L