Liddy

Im having a hard time understanding the problem if somebody could clarify for me it would be great,

the ac works for 2-3 minutes then stops and the ac compressor doesn't turn on anymore, i checked my control unit for codes and i found out that i had code EB1 234 sun sensor . EB1 235 Emission sensor & EB1 459 Series interface (K2) instrument Cluster (A1).

is the emission code for a bad O2 sensor ?? and what kind of affect it has on with the ac not working ?

i Replaced my sun sensor with a Genuine replacement and reseed the unit and dont see no codes anymore but the ac is still not working still doing the same thing. maybe i have to wait for more time till the system resets itsellf not sure ? if anybody has any knowledge on what to do here it would be much appreciated

Plutoe

The AC system will not reset itself-----my quick suggestion is and assuming you cleared the previous faults, take another fault test---what returned. I would also take the system test and post the first seven data reads.
FYI, none of the original faults would turn the compressor off.

Liddy

Sorry im kinda new on the mechanic world, Whats a system test. do i need a MB Computer to pull live Data or ac pressure gauge data ?

kajtek1

http://www.mercedesmedic.com/ac-air-...le-codes-list/
Follow the procedure including notes. Start with clearing the errors.
Emission sensor is in cabin air inlet and switches to REC when you follow smoking pickup
Never have experienced how it works on west coast.

Plutoe

No the W210 was the last model that you use the AC control unit to extract the faults and system data------there are thousands of posts on the subject most with a good description of doing the two tests. If you havent looked in our stickies than I would googe the the subject.

Liddy

I just replaced the EVAP Temp Sensor $6 and the A/C started Working without a problem after a couple days of use i noticed that after 20 minutes of having the Ac on The compressor wont Kick in, but if i turn the car off and leave it for 5-10 minutes everything works again without a problem.

What could be the issue

kajtek1

Are you asking us to crystal-ball it, or help with linked troubleshooting?

davmil2002

Exact same problem. It was the "evaporator temp sensor" under the dash. Cost me ~$300 incl. $90 part. Air conditioners in these cars are not up to Southeastern heat/humidity like American and Japanese ones.

Plutoe

Hey Biff, remember we are driving twenty year old cars whos AC systems were much better than competition of the day----things advance!

Liddy

Gens,
Problem fixed:
after replacing the EVAP Sensor i performed another scan thru my control unit on the dash and it gave me the low pressure code but the ac gauges were indicating that is filled correctly , so when i reset the code the ac used to work till the system reset itself. i pulled the refrigerant out and i changed receiver drier pressure sensor and refrigerant temp sensor that is located on the drier.
Used a CoolTech 34700z and performed a vacuum leak test and recharge and ac works perfectly