Mb 400sel-93. A/C COMPRESSOR TURNED OFF AFTER RUNNING, SOMETIMES AT BEGENUNG. SENSORS READING ARE 1- 9F, 2-6F, 3-84F, 4-84F, 5-85F, 6-63F, 7-8, 8-21. later after comressorturned off 1- 5, 2-7, 3-69, 4-68, 5-64, 6-86, 7-12, 8-21. After pressing preparation for test for codes, irtdoes not show on led. Left on red, right on blue, turn on, then rest, after 20 seconds ec and c, nothing is displayed. where is located the in-car temp. ssensor?. Only sensors and result could be read it

The MB 400sel-93, A/C compressor turned off, after running for a while or some times it does not turn on when engine is on. Sensor data is obtained from the digital Climate control at dash, but trouble codes can not be seen. Sensors 1 read- 9 F, 2- 6F, 3- 84F 4- 84 F, 5- 85F, 6-63F, 7-8, 8-21, 9-62F, 16-0. After compressor turned off itself, read 1- 5F, 2-7F, 3-69F, 4-68F, 5-64F, 6-86F, 7-12, 8-21, 9-62, 16-0. I just tried to collect trouble codes follwing intructions: left to red, right to blue, ignition on, REST, after 20 seconds EC AND C AT SAME TIME," BUT NO DISPLAY:. where is located the in-car temp sensor (with aspirator blower)?

Any help, thanks

In-car temp sensor is located in the dome lamp.

ON that model the a/c pushbutton sends command signal to a computer in the computer compartment & that module(base module) turns on the compressor.

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I will try to see the base model and identify it. Do you know if the in car temp sensor is ok according to the reading that I obtained. May I acquire it trough here?.

Thanks again

What you're doing doesn't sound like the same procedure described on the bottom on page 87 here - http://www.motodok.com/Documentation/Files/MB/cs1000-mb.pdf

You are right. I was looking for such information, specificly for this car. Apparently I WAS USING OTHER. I really apreciate your response. Now I have all procedures. Thanks a lot.

You're welcome. Good luck with it.

Most A/C issues are freon low related if it ever works at all. Remember it cant be checked uless the compressor engages and you get it to around 2k rpms. Reading should be around 35 psi at 2k rpms. At idle or off gage should be pegged.