Quote:
Originally Posted by mespe
The first time I pulled the codes, these are the numbers. Key on engine off and had been off for several hours
1: 87
2: 80
3: 100
4: 98
5: 100
6: 100
7: 06
8: 85
9: 27
10: 0.0
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Afraid the numbers are only useful with engine on while driving the car. Numbers 3 & 4 are the left & right heater core temperatures. With good numbers we can tell whether the duovalve is admitting hot coolant or not. It's the easiest way to diagnose a faulty duovalve.
Quote:
Originally Posted by mespe
Unless Mercedes turns the heater on for the driver side, the A/C has a good charge, as the passenger side blew pretty cold.
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It's well established that cold right hot left can result from low refrigerant in the 210 chassis:
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