The disc is pretty good for the 201. It was one of the first and has all of the data you need with the exception of transmission repair.
I would check the EHA governor and make sure it is not wet with fuel.
You do have a Coolant sensor that is responsible for fuel mixture. It is the most rearward sensor below the valve cover.
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Benzmac:
Donnie Drummonds
ASE CERTIFIED MASTER AUTO TECHNICIAN
MERCEDES SPECIALIST 11 YRS
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