Quote:
Originally Posted by ramtony
that;s not the problem, i have the same problem on my 99 e300, look for a dual valve that controls the temp for both of the heater cores, its located by the cpu on the passenger side close to the strut. they get stuck just tap it a few times and if that works then u should be able to take it apart an clean it. good luck....
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Don't be so sure. This is a common complaint on the W210 and is rarely the duovalve. If you have warm air out of the right side, however, it is almost certainly the duovalve at fault.
The way to tell is to turn off the compressor and check temperatures. Just like I said above.