The "codes", are they attainable from the on board diagnostics or do I need to plug her up at the dealer?

The HHT readings were taken on the cars first start up since yesterday. It's about 90 degrees out when I took the reading, around noon time when I started her up. It took me approximately 3 mins to figure out how to scroll to value "07" where I took the reading of 4.0. Engine off, posted the reading.

I can post the other values if it can shed more light on the matter.

Sokoloff, whom I have chatted with, with his identical experience

in thread 210 chassis climate control problem

in a nutshell, had to replace the sensor 210 830 05 72 under the dash and after reprogramming the climate control unit it did the trick. I am not sure though, I need to clarify if refrigerant was ever the issue.

Thanks all for your input and hopefully things will work out

I had basically the same problem as Patrick suggests. Freon level was never low and once the sensor was replaced, everything was right with the world again. Mercedes put out a technical bulletin about this issue, so it's a known problem with these climate control systems. The bulletin basically says to replace the sensor before you do anything else, reprogram the system and see what you've got. In my case, everything returned to normal and the system has worked well for six months now.

I sure wouldn't spend a penny doing anything until that sensor is right.

Len
'99 E300TD 68,000 miles

Ok, I have my new Evap Temp Sensor ready to go, but
I am drawn aghast at my inability to locate where to plug her into.

I have edited an email below to my compadre Sokoloff, who has so kindly shared is EC staying lit problem(A/C not engaging) with me.

Len,

"Ok I have the drivers side underdash panel removed. In addition I removed the adjacent panel under the steering wheel. I am disappointed at the trouble I am having trying to locate the Evap Temp Sensor. You stated in your previous email that the sensor would be located on the driver side, high up on the console. Can you possibly clarify for this big knucklehead here, by where high up on the console is(:

From my contorted vantage point of looking up at the underdash compartment area, straight above I can see the back of the instrument cluster which includes the speedometer and odometer, etc. Then to the left (towards the center console) there are some bundled wires and I can see the air-flow housing that goes from my left to right, spilling into the terminating driver side vent. I can not seem to locate the sensor."

Can someone/anyone!! here share there technical expertise and help to get this sensor home?? Thanks all for any input you can offer.

I should clarify, the fix is for a W202 98 C230. Thanx all who can help.

-Pat

I installed the new Evap Temp Sensor. It was a pain to find, sadly I will admit it took me several hours just to locate the dang thing, and it was right in front of me the whole time(thanx Len and Steve) The dissassembly of the bottom panel was the easy part; only taking about 10 mins referencing this excellent thread here need advice on removal of underdash panel & r/v mirror assembly of '97 c280


I fumbled around with the on-board diagnostics using the thread here

210 chassis climate control problem

which, from what I understand is for the E-Class w210.

My C230 on-board diagnostic reset was a little different, i.e. I didn't have to add 16 to the P2 value, and my 98 does not have split left and right climate controls like it seems to refer with the EClass, but like I said after I fumbled around a bit, and checked if it did the trick, I can happily say that the EC light is now off and the A/C...whewwwWW it was sadly missed!!

So in summary:

Bought the Evap Sensor from the dealer =$47.17(cheaper online $39.55 if you can wait a couple days)
Disassembled the bottom driver-side underpaneling.
Replaced Sensor
Reset the on-board diagnostics

I don't know what I would have paid for the fix at the dealer, but I imagine I saved a BUNDLE. Total cost to me:
Sensor =$47.17Contribution from fellow members=priceless
Approximate time to accomplish= 1 hour (considering u locate the sensor)

Anyone who happens upon this thread feel free to shoot me a message and many thanks to ALL who contributed to this mercedesshop.com success story, especially Sokoloff, Stevemlb.

-Patrick
Eglin AFB, FL

Glad to pass on what others have helped me with Patrick. Good job!!

Len

Patrick,

If you take the car to Quality Imports you'll pay through the nose. I've used C&B Automotive on Chicago...which is off of Hollywood...for several years now. Bill is honest and reasonable...if there is such a thing as reasonable for a Mercedes.

__________________
Don
'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000