plasma

Hello,

I've noticed that over the last few weeks that although my A/C still blows cold air, it was slowly warming up. Yesterday morning on my way to work the air seemed okay. A few hours later when I got into the car, the air was just blowing hot. When I got home and hooked up the refrigerant, the pressure read the the lowest setting on the gauge. So I filled it with about a half a can of freon and now the air blows colder in the right vent than the left.

1. Is that a sign that I need to still add more freon?
2. Is there a way in a W211 to read the A/C codes? I've seen how to do it with W210's, but that ac panel is partially digital, where mine isn't.

Thanks..

Plutoe

With the W211 you lost the self diagnostics available on the W140 and W210---now you need factory or equal diagnostics to read the faults.

A cheap way is to purchase a set of AC gages, however if you don't know how to use and interpret the data you may as well suck your thumb!!

kajtek1

Don't listen to advice on W211 from W210 driver
W211 have several types of climatronics and some of them allow for reading the sensors just like W210 did.
Our first W211 had 4zone climatronic with such feature.
Next w211 come with LCD display, but no Rest button.
I bought 4-zone climatronic on ebay for about $50 and now can read sensors on it as well.
It is way much "cooler" display anyway and it is plug&play.
About 20 minutes to replace if you have never done it before.

PSDCampervan

A/C warmer on left than right indicates low on R-134A but best to keep track of how much is added as 950g is capacity for dual zone & too much will keep A/C from cooling ice cold. I used a small digital scale to add 50g increments until both sides blew 40 F air temp. I used R134A w/ UV dye & traced leakage to presto-valves for high & low pressure manifold connections. I replaced the plastic/rubber caps on these connections & used teflon tape to make sure they seal as best I could. A/C blows cooler than a polar bear's toenails for time being.