Date registered: Jan 2010
Vehicle: 99 E430, 01 E430 Sport, 00 SL500
Location: LA, CA
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>>B1416 - Coolant circulation pump (M13)
Maybe the dealer saw that B1416 then quoted $4500.
I had left warm, right cold problem before. "Servicing" the duovalve following the stickies did not help. The values of sensor#3, #4 were still way off from each other; their difference was as much as 15. I think Matt L once said that #3, #4 should read about 2 or 3 from each other when duovalve worked. Anyway, I charged a little more refrigerant into the AC, putting the can upside down. On the gauge, there was a blue zone for filled pressure, I went for the border line between blue and yellow. Both vent sides blew cold right after I did that. Sensor #7 fluctuated between 15-17 at idle. In my other car, sensor#7 reads 15 but the AC worked perfectly.