Car: 2001 E430

I force-started my aux fans by holding both AUTO buttons down for 30 - 33 seconds, with the engine running. Then I displayed Climate Control status codes (by holding REST button for approx 10 seconds):

01 = In-car temp sensor
02 = outside temp sensor
03 = left heat exchanger temp sensor
04 = right heat exchanger sensor
05 = evaporator temp sensor
06 = coolant temp
07 = refrig. pressure in bar
]08 = refrig temp sensor
09 = nothing
10 = Blower control voltage
11 = emissions sensor (B31)
12 = sun sensor
20 = aux fan control

I read online that the values for aux fan control (20) should be 6.1 to 10. This was a single source so I will not assume it was authoritative.

My values were:
Fans on Full: 21.1
Fans Off: 3.2
Fans low speed: Did not check.

Is this evidence that not only are my fans failing, but perhaps the control module as well? (The 3.2 value concerns me, and perhaps explains why the fans don't start without a push, except when force-started with high voltage.

Additionally, with the fans at full, refrigerant pressure reading (07) showed 20 and did not budge. With fans off, it fluctuated from 05 to about 11 when underway; and into the mid-teens when stopped (outside temp 70 degrees). I am obviously low on refrigerant, despite a pressure gauge reading of 40-43 psi.

__________________
2008 E350 4matic / Black/Anthracite

------------------------------------
Gone but not Forgotten:
2001 E430 4matic, 206,xxx miles, Black/Charcoal
1995 E320, 252,xxx miles, Black/Grey
1989 260E, 223,00 miles, Black/Black