Johnnyw211

Just bought a 2008 w211 in Ireland but no air con working. So far I've recharged the gas and removed the low gas fault code but still only blowing warm air. Any suggestions

LexBrett2

Have you tried the AC fuse and relay?

Johnnyw211

Don't know where they are located?

ot1

When YOU recharged it did you vacuum the system or just add 134? did you recharge it using manifold gauges? What were your final pressures? Does your A/C compressor clutch engage?

Johnnyw211

I got it recharged with 134 gas in halfords by the guy in shop. He showed me the gauge was in the green after refill but the ac button light was flashing red so clutch didnt engage. I got low ac refrigerant code read by scanner and deleted now red ac light stays on but still no cold air.

kajtek1

http://www.mercedesmedic.com/ac-air-...le-codes-list/
Here is procedure for troubleshooting. Read the note at the bottom what we need to analyze.

Johnnyw211

Is this procedure for a w210 or a w211 or both? Thanks

efonz

There is a similar procedure (it could actually be the same procedure) for the W211 but it all depends on what climate control interface you have. IF you have the REST button this is possible, if you have the one with a "0" or "OFF" button in the middle with no REST button then you can not diagnose AC problems in this manner; at least not until someone figures out the button combination for the alternate AC control interface but I dont think it exists.

Johnnyw211

What next

efonz

https://mbworld.org/forums/w211-amg/...t-ac-menu.html

kajtek1

Procedure is basically the same for all MB of last 20 years.
As you could read the note on page, the readouts can require different procedures.
Some W211 have climatronic with REST button, what will read exactly like W210, If REST is not working - you need to use scanner.
You have all the info on single page at MBmedic. All it takes it read carefully.

Johnnyw211

Thanks for the replys guy's.
Will try latter and give feedback.

Johnnyw211

Tried the hold auto button no luck.
Tried the hold rest button no luck.
Tried the scanner but no faults found.

Johnnyw211

Is it possible there is another recharge port to be charged under the bonnet.

Johnnyw211

YES - You can't believe what was that. In UK we had mobile aircon specialist

who has connected his "equipment" and said that there is too much pressure in air con system - so we were thinking that we have full system. After 2 attempts of resetting computer the light was still back. We went to another aircon specialist in POland and he said that the idiot in UK almost fuc... our aircon system because in Mercedes there is some special way how do u measure pressure - at the first sight u can see that you have full pressure but there are 2 zones and you have to measure them separately - so he did check only 1 zone - the 2nd zone was empty and computer is preventing the whole thing against collapse by switching it off. He said if you force and reset computer 2 -3 times it will allow the system to work on low or no pressure your pump can be gone.
We have filled up the second zone and the system is on and working.
#### I just found this from a previous thread and was wondering where is the 2nd recharge port#####

kajtek1

I know the REST button opens sensor values on W211 4-zone climatronic, but how it works on your I don't know. You can play with holding REST and AUTO together for 5 seconds, or other combination of keys, but MB keeps those things secret and no guarantee it will work.
You keep ignoring the procedure I linked for troubleshooting.
Beside clearing potential errors, you need to use scanner for sensors reading.

kingsizexx

have u considered talking to a specialist? got the same issue on my tesla and it really hurt my life lol.. everytime when we would go for a family trip to mountains, especially in summer time, my air conditioner would stop and we were just getting toasted in middle of the road. Well, I've tried many services and it was breaking every time after a little travel distance from it. And one day after it broke again I gave up and decided to search for some new solutions, thanks god that I came across guys from socool.sg that could fix it for me.