Rui Martins

Hello, I have the following values of climate control.
https://youtu.be/w8B-7fFZnbo

Anyone can help me, especially the 7 that is the pressure, is it ok?

Other issue is the left and right vent has different temperature...left seems that there is no cold air, but right is cold as hell.

khomer2

Rui,
Dont be lazy, post your readouts.

Rui Martins

1- 43
2-38
3-15
4-08
5-32
6-81
7-13
8-60
9-05
10-6
11-2.0
12-4.0
20-2.0
21-0.7
22.00
23-00

khomer2

7 is the pressure in bars. That seems ok.
3 & 4 are your heater core temps - left and right respectively - they should be the same if they are blowing correctly.

Where are your error readings?

Rui Martins

Thank you khomer,

I have filled the AC system last saturday and few hours later I got the error B1241 - Low freon. I reset the error and then seems itīs fine, except the left core temperature itīs warm and right one very cold.
Probably the car workshop didnīt filled with the correct quantity of freon. How can I check it?

Thank you

khomer2

They refilled with Freon?
What year is your MB?
Please update your user CP info to include your w210 year.
MBs since 1991 used R134a refrigerant.

Rui Martins

They refilled with R134a

Its a 320CDI from 2000.

khomer2

Check the sticky's for "Duo valve". This valve controls the coolant going to each side of the heater core. Possibly, one side is stuck and keeping the heater core hot all the time, even when AC is on.
Duovalve Removal and cleaning

Did your car shop check for leaks with UV dye at all when they refilled?

Rui Martins

Thank you I will check. They did a pressure test in order to check the leaks and everything was fine. They did a test like 2minutes after the refilling and both heater cores were cold. But after some hours I got that error of low R134 (EC light always red). After reseting the AC itīs only working for the right side...

For me is that they refilled the R134 with incorrect KG.

khomer2

ok so that's good they tested the pressure, but for how long was the pressure test?
You can still have a possible (slow) leak somewhere?

But check the link provided first, and do a search and read up on the past threads related to this "no ac on left side". Do the simple checks/tasks first to see if it resolves your issue.

kajtek1

You can spend weeks dropping parts in the system, or you can spend 90 seconds to troubleshoot it.
http://www.mercedesmedic.com/ac-air-...le-codes-list/
Come back with 2 sets of reading per the site and attached notes.