AC blow cool air then blow ambient
Here is the code from my 1999 E320 with the engine & A/C switched on.
Does it mean I have a bad evap temp sensor, where is this sensor located ?

Thanks

The AC temp was set as 72 per instruction and car was park in side garage while I took this value

1 = 75
2 = 73
3 = 80
4 = 78
5 = 143
6 = 85
7 = 06
8 = 76
9 = 27
10 = 1.1
11 = 0.3
12 = 4.3
20 = 3.2
21 = 32
22 = 00
23 = 32
24 = 11.6
40 = 164
41 = 85
42 = 40
43 = 136

Sure does. Unless you have some other reason for having an evap temp at 143 deg.

__________________
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician

Thanks Steve

Can you plese let me know where is the Evap temp sensor locate, I remove the panel under streeing wheel, but still can not find it. My car is 1999 E320

Thanks
Tan

TAn,
How did you get the codes? I have a similar problem with my 99-E300TD. It happends after 5-10 minutes if I drive on highway or city. I had a brand new compressor + dryer installed a week or so ago. It worked fine just a day or two.
Thanks, PAT

__________________
pat201

the code from this link, does not know t's the same for your car or not, but the author said pretty much similar

http://www.continentalimports.com/ser_ic40142.html

Good luck

Tan,
I did the test. Here is what I have:
1 (In-car Temperature sensor B10/4) = 102 F
2 (Outside temperature sensor B14) = 112 F
3 (heater core temperature sensor left B10/1) = 111 F
4 (Heater core tempertature sensor right B10/1 = 109 F
5 (Evaporator temperature sensor B10/6) = 147 F
6 (ETC sensor B11/4) = 188
7 (Refrigerant pressure in bar) = 25 bar
8 (Refrigerant temperature sensor B12/1) = 138 F
9 (?) = 27
10 (Blower control voltage) = 5.3 V
11 (Emissions sensor B31) = 2.5 V
12 (Sun sensor B32) = 3.8 V
20 (Control current for auxiliary fan) = 21.1 mA
21 (Engine speed) = 420 rpm
22 (Vehicle speed) = 0 km/h
23 (Terminal 58d) = 32%
24 (Battery voltage) = 13.1 V
40 (Software status) = 164
41 (Hardware status) = 32
42 (?) = 08
43 (?) = 136

I also did the second test called DTC Memory (when you set the left temperature selector HI and teh right at LO and then you press REST and EC buttons for more than 5 seconds). The only code displayed was E on the left hand side of the screen. Then after I pressed AUTO to get the many codes I read about, the only code displayed was FF on th eright side of the screen.

I would appreciate any suggestions.
Thanks PAT

__________________
pat201