Do I have an AC issue?
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
The solenoid is what makes it variable. It allows the ECU to control the level of cooling at a fixed RPM even if the magnet is fully engaged.
I would need to record mine to compare to yours. To me, 1 C is border line freezing the evaporator, so it must be cooling well. Recall there a few sensors outside, and inside to keep the AC at the set temperature.
I would need to record mine to compare to yours. To me, 1 C is border line freezing the evaporator, so it must be cooling well. Recall there a few sensors outside, and inside to keep the AC at the set temperature.
Out Of Control!!
Joined: Apr 2019
Posts: 11,923
Likes: 6,776
From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
now look at other PID's with your scanner:
compressor clutch
A/C pressure
control valve rate
Last edited by CaliBenzDriver; May 20, 2025 at 09:52 PM.
MBWorld Fanatic!
Joined: May 2018
Posts: 6,600
Likes: 6,547
From: Jakarta-Indonesia
2014 - W212.065 - E400 ( M276.820, 3 liter Turbo) RWD not Hybrid
It is called HUMIDITY DEPENDENT setting.
Use your Launch to change it to FIXED 2C
.
.
.
Also change the radiator ( also condenser) fan speed "quietness" target to NO.
.
.
.
.
MBWorld God!
Joined: Dec 2019
Posts: 32,222
Likes: 6,281
That is normal factory setting.
It is called HUMIDITY DEPENDENT setting.
https://cimg2.ibsrv.net/gimg/www.mbw...dfdfd59c40.jpg
Use your Launch to change it to FIXED 2C
https://cimg4.ibsrv.net/gimg/www.mbw...3b19c95053.jpg
.
https://cimg6.ibsrv.net/gimg/www.mbw...dabca81dd3.jpg
.
https://cimg5.ibsrv.net/gimg/www.mbw...603179c330.jpg
.
Also change the radiator ( also condenser) fan speed "quietness" target to NO.
https://cimg8.ibsrv.net/gimg/www.mbw...84020121d7.jpg
.
https://cimg9.ibsrv.net/gimg/www.mbw...b938d17bba.jpg
.
https://cimg0.ibsrv.net/gimg/www.mbw...a05a3f4497.jpg
.
https://cimg1.ibsrv.net/gimg/www.mbw...cdc83ec81b.jpg
.
It is called HUMIDITY DEPENDENT setting.
https://cimg2.ibsrv.net/gimg/www.mbw...dfdfd59c40.jpg
Use your Launch to change it to FIXED 2C
https://cimg4.ibsrv.net/gimg/www.mbw...3b19c95053.jpg
.
https://cimg6.ibsrv.net/gimg/www.mbw...dabca81dd3.jpg
.
https://cimg5.ibsrv.net/gimg/www.mbw...603179c330.jpg
.
Also change the radiator ( also condenser) fan speed "quietness" target to NO.
https://cimg8.ibsrv.net/gimg/www.mbw...84020121d7.jpg
.
https://cimg9.ibsrv.net/gimg/www.mbw...b938d17bba.jpg
.
https://cimg0.ibsrv.net/gimg/www.mbw...a05a3f4497.jpg
.
https://cimg1.ibsrv.net/gimg/www.mbw...cdc83ec81b.jpg
.
On a side note, on the topic of a/c so we were talking about nitrogen (I mean the liquid form) on the thread, I realized that is a good cooling agent to have when you don't use a/c (just kidding).
