My 2000 CLK320 coupe recently had the check engine light go off. The MAS was replaced under warranty.

Ever since, the air conditioning has been acting up. After being parked overnight or for 8 hours at work, the vents only blow uncooled air out! Even at the lowest setting, no cold air comes out. This is true even if the car is driven for 30 minutes.

However, if I drive for 10 minutes, stop and go get groceries (for example), and then restart the car, the air conditioning will blast cold air at me. I did the diagnostic and came up with these values (air conditioning was working at the time)

1 (in car temp) 28
2 (outside temp) 30
3 (heater core temp L) 16
4 (heater core temp R) 15
5 (evaporator core temp) 5
6 (engine coolant temp) 88
7 (refrigerant pressure) 4
8 (refrigerant temp) 35
9 (not used) 0
10 (blower control voltage) 1.2
20 (control current of aux fan) 0
21 (engine RPM) 7
22 (vehicle speed) 0
23 (terminal 58d battery charge) 0
24 (battery voltage) 14.0
40 (software status register) 8
41 (hardware status register) 5
42 (???) 232
43 (???) 30

Then I repeated the diagnostic when the A/C was malfunctioning. The Evap Temp Sensor said 19 and wouldn't get any lower while the fan just blew warm air at me. Then after 15 mintues, suddenly the A/C turned on, blasted freezing cold air, and then the sensor said 3!!!

So I got the Evap Temp sensor replaced but it didn't fix the problem. The OBDII diagnostic yielded the following error codes:
B1234: Sun Sensor
B1421: Cycle Module

HELP!?!?! I understand that you can ignore the sun sensor error code, but I can't find much about the cycle module on these forums.