MB Doc,
Thank You.

I discussed this with a Mercedes Master Tech and he suggested several possible problem areas;

- Might be the lower engine harness as these have proven to be problematic in the past in terms of cracks in the wires which might cause erroneous fault indications
- Might be a fuel pressure problem causing the hard starting
- Might be the knock sensor

Also the reason for the P1386 fault code is due to the OBDII code reader being a generic reader and not MB specific.

Do you have the Ohm values for the knock sensor?
What about the voltage for the wiring harness at the sensor.

BTW, they are located under the engine mounts on the 210's