TexasRedNeck

I've searched for 2 hours without answers so I am posting here for help.

My 2007 CLS has 71,000 miles on it and today the driver's side began blowing warm and the passenger side was cold. It was 78 outside (yes winter in Texas!)

I could not find instructions on getting into diagnotic mode for my CLS, but I tried experimenting and by pressing "auto" for a few seconds it seemed to come into a diagnostic mode. Here is what I saw. (there were 99 freakin' codes in there!) I only listed those with values other than 00

00-26
01-30
02-25
03-31
04-21
05-18
06-78
07-10
08-99
09-27
10-25
11-75
12-60
13-22
14-30
15-43
16-06
18-42
19-66
20-65
21-01
25-31
26-02
27-60
28-31
30-09
33-01
44-32
45-32
49-09
50-09
51-23
52-45
55-1B
56-01
57-02
58-01
59-FF
60-FF
61-13
62-24
63-02
70-27
73-04
74-25
77-08
83-01
84-01
88-21
89-70
90-70
95-12
97-12
98-72
99-01

Thanks in advance for any and all help

TexasRedNeck

Anyone have any ideas here?

indymerc

hello,
may i just ask what type of scan tool are you using?the codes dont look any use to me.
i suspect possible temp sensor in heater box or duo valve but if possible id recommend deleting all those codes and see if any reappear.

TexasRedNeck

I was fiddling around with what I believed to be the self diagnostic mode in the AC. Any ideas about how to enter the diagnostic mode? I have an Auto Enginuity scanner for my truck, but have not purchased the "module" for the benz yet. I'd like to save that 250 if the car has self diagnostics.

Thanks!

MBSamurai

Don't waste your time with all those codes. Trust me, it is probably just a few ounces low on freon. Sounds crazy and doesn't make sense, but usually fixes it if is charged fully.

TexasRedNeck

Update, I took it to my indy and they told me: Leaking evaporator and leaks around the Schrader valves.

$3600 after haggling with them a bit. Apparently the entire dash has to come out of the car. I could have put an AC in my house for that much.

CLSED550

That Price is insane. i dont even know how they justify that!
FYI
Evaporator is buried in the dash but shredder valves are same valves that are in your tires. There is one on hi pressure line and one on low pressure line. This is where they hook up ac machines to evacuate and recharge vehicles. (Sometimes shrader valves are hidden under sensors, but very accessible)

Any time in late model mercedes makes a hissing noise ( expansion valve ) the dash or extreme differences from vents it's low on freon. Many times the first time you bring it in they will not fix the problem, they will install a die (yellow) into the system when replacing the lost gas. And the next time it leaks they can identify the problem with a ultra violet light.
Always keep in mind "freon never runs out, it leaks out. It's a sealed system until a leak springs"

You might know this, just for some guys to have a heads up when going in for service.

TexasRedNeck

Thanks for the note. I would sure like someone who knows to tell me what the "book" lists for number of hours of labor for removal and replacement of the evaporator core along with the evacuation and replacement of the Freon.