Before you go crazy chasing stuff around make sure the A/C system is fully charged!

IIRC a low charge will cause what you are experiencing.

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Jim

Probably just low on refrigerant, but it's easy enough to diagnose. Read through Steve Brotherton's article here: link, put the climate control in diag mode, and post up the values of items 1-10 from the display. While the car is running, and has been running for a few minutes, BTW. The numbers will tell whether you have a leaking duo-valve or not.

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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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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