Come On People...... almost 250 view and not one comment to help???

Very dissapointing!

 

This is a well known feature. I've found some keys to the codes (i.e. what parameter is being displayed) but I've never found anyone, even MB technicians who have a complete list of what they all mean. Also, as far as I am aware, this is only a display/repeater, you can not modify any settings or give any commands through this function.

LR

 

Do a search and do not be so lazy, it is all here on the forum. Check out the E class forum and see:thumbsup:

 

Hey guys, this hidden menu is used to check all the fault codes in your ac system, and also allows you to erase them which in turn unlocks the ac compressor if youve ever ran out of freon. Just did this last week to refill the freon and it was a great, dealers were trying to charge me to reset with star diag, but i did it myself

 

I will elaborate on this gents post after I have finished reading the whole section on this type of test:thumbsup:

 

You got the answer in post 5. But if you want to try the other test press and hold the rest button only whilst AC is on and you will find another list of readings you can scroll up with the left and down with the right and here is what they mean;

Display on left Description

0 AAC in-car temperature sensor (operating module)
1 Overhead control panel for in-car temperature sensor
2 Outside temperature sensor
3 Left heater-exchanger in car temperature sensor
4 Right heater-exchanger in-car temperature sensor
5 Evaporator core sensor
6 Engine temperature
N Refrigerant pressure
8 R134A refrigerant in-car temperature sensor
10 Blower control voltage
15 Average insolation value between 0 and 125%
16 Carbon monoxide value between 0 and 1023
17 Nitrogen oxide value between 0 and 1023
18 Dew point temperature
20 Fan output value between 0 and 100%
21 Engine speed
22 Ground speed
24 Battery voltage
27 Left hand potentiometer engine speed value between 0 and 100%
28 Centre potentiometer engine speed value between 0 and 100%
29 Right hand potentiometer engine speed value between 0 and 100%
30 Temp of blow air in left rear passenger-compartment
31 Temp of blow air in left rear passenger-compartment
32 Temp of evaporator core in rear passenger compartment
33 Blower voltage in rear passenger-compartment
34 Specified temperature in left rear passenger-compartment
35 Specified temperature in right rear passenger-compartment
40 Left hand defroster door value (open/closed plain text at limit stop)
41 Right hand defroster door value (open/closed plain text at limit stop)
42 Left hand footwell flap value between 0 and 100%
43 Right hand footwell flap value between 0 and 100%
44 Left hand blend flap value between 0 and 100%
45 Right hand blend flap value between 0 and 100%
46 Left hand diverter flap 0 and 100%
47 Right hand diverter flap value 0 and 100%
48 Recirculation door 0 and 100%
49 AKF bypass flap 0 and 100%
50 AAC Software
51 AAC Hardware
52 Software for rear passenger compartment air conditioning
53 Hardware for rear passenger compartment air conditioning
54 Software for stepper motor unit
55. Hardware for stepper motor unit
56 Software for centre nozzle
57 Hardware for center nozzle
58 Software for multifunction sensor
59 Hardware for multifunction sensor
60 Sofware for day-brightness sensor
61 Hardware for day-brightness sensor

 

Thank you ERIC! You are the man.

LR

 

All... Many thanks for responding...but... I am NOT referring to the following:

* REST button (Pressed ) alone to review the NXX. details
* REST + Carbon Filter Button (Pressed) for Aircon Diagnostics and reset.

I am referring to the REST and RECYCLE button that brings up the following logo /*/ (but horizontal) and only goes up to N14.00, Eric perhaps you can shed some light on this query?

Many thanks for the replies.

MAC

 

All... Many thanks for responding...but... I am NOT referring to the follow

* REST button (Pressed ) alone to review the NXX. details
* REST + Carbon Filter Button (Pressed) for Aircon Diagnostics and reset.

I am referring to the REST and RECYCLE button that brings up the following logo /*/ and only goes up to N14.00, Eric perhaps you can shed some light on this query?

Many thanks for the replies.

MAC

I sure can, but I would need to read the appropriate section on WIS first, maybe in the morning as I am at home now. The thing is I always use DAS so I have never bothered with the on-board diagnostics, but I do have access to that info, will let you know.

 

ERIC!!!

Hi there have you made any progress on my query???

Thanks

TPP

 

Eric Have you forgotten about my query???

Eric

I was expecting some information to help with the understanding of query.... are you still able to help?

Regards

TPP

 

Eric

I was expecting some information to help with the understanding of query.... are you still able to help?

Regards

TPP

Sorry, I can find nothing, but am still looking.

 

thanks Eric for posting the list! Can anyone also post the spec. of the value? so we would know which part failed.

 

Hi all,

Does anybody know if there is any hidden menus on W220 that can display the information on how full the dpf is clogged up?

Any information is much appreciated.

Thanks,

David.

 

No Longer Hidden

Hi All

It is .... The A/C Flap and Compression adjustment menu.
each number represent different flap adjustments.

Thanks

TPP

 

No airco on the right side

Hi all,

My problem is that on the right side (drivers side) i have no airco. I have air but no airco. When i put on both sides LO and on the top blower on blue you can feel a differance of +/- 5 degrees Celcius between the right side and the left side.

As far as i've been reading on this site i think the temerature sensors are all working.

Anybody got any idea what the problem might be???

Thanks in advance,

Bori$

BTW: S430 (W220) - 1999 NL

 

A/C Issues!

Try my initial steps and place the counter to 13.XX and to 50% and that will confirm if your compressor is working?

It could also be your pressure sensor, how many bar do you have?

Thanks

TPP

 

Try my initial steps and place the counter to 13.XX and to 50% and that will confirm if your compressor is working?

It could also be your pressure sensor, how many bar do you have?

Thanks

TPP

I am following your directions, how do you adjust the settings...using the heat and cool scoll buttons?

 

Here is the list when i hold only REST for 10 sec:

00: +20,6 C
01: +20,0 C
02: +49 C
03: +15 C
04: - 12 - +36 C (BROKEN???) (SECOND CHECK: +8C)
05: +12,1 C
06: +86 C
07: 6,5 BAR
08: 29,6 C
09: 0,0 K (0,2K)
10: 1,7 V
11: 0%
12: 0%
13: 0%
14: 0%
15: 0%
16: 66 - 110 (BROKEN???)
17: 913
18: 19,5 C
20: 40%
21: 649/MIN
22: 0KM/H
23: 44%
24: 14,2 V
27: 100%
28: 0%
29: 100%
40: ZU
41: ZU
42: ZU
43: ZU
44: AUF
45: AUF
46: ZU
47: ZU
48: UMLUFT
49: AUS
50: 27
51: 4198
54: 36
55: 10
56: 28
57: 10
58: 41
59: 02
60: 22
61: 13
70: AKTIV
71: AKTIV
72: INAKTIV
73: AKTIV
74: GERENELL
75: INAKTIV
76: ZEITBGR.
77: AUTOMAT.
80: AUTOMAT.
83: MÖGLICH
84: m.Sonne
85: AUTOMAT.
86: GESCHL.
87: ESL
96: 24 Nm
97: 70%
98: 700 mA
99: 18,9 C

Wrote this around 10:00 PM. Hope you can help me. Thanks in advance.

 

w220 AC parameters

I have discover the legend in German language of those 0 - 99 parameters. Simply push REST and “0” > 5 sec. while ignition in 2 position.
I am working on traslation to english.

Thanks
2002 S500

 

AC legend

Does someone can traslate some german terms (UPPER CASE) to english ?

REST > 5 sec. AC 0 – 99 parameters without legend.
REST and “0” > 5 sec. AC 0 – 99 parameters with legend (german)
REST and DEFROST > 5 sec. do nothing
REST and RECIRCULATE 5 > sec. AC 0 – 13 vent doors test
REST and ACTIVATED CHARCOAL FILTER. AC error diagnostic and clearing (two AUTO buttons)
REST and REAR WINDOW HEATER do nothing
REST and EC (AC OFF) > 5 sec. do nothing

Description S500 (2002)

0 0 AAC incar temperature sensor (operating module) 30.6 Cº
1 1 Overhead Control panel for incar temperature sensor 30.2 Cº
2 2 Outside temperature sensor 24 Cº
3 3 Left heater exchanger in car temperature sensor 20.6 Cº
4 4 Right heater exchanger in car temperature sensor 12.2 Cº
5 5 Evaporator Core sensor 2.1 Cº
6 6 Engine temperature 88 Cº
7 7 Refrigerant pressure (7.5 BAR Stand-by) 9.5 BAR (AC ON)
8 8 R134A Refrigerant in car temperature sensor 28 Cº
9 L UNTER KÜMLUNG 9.9 K
10 10 Blower Control voltage 1.8 V
11 SONNE LI VO 22 %
12 SONNE RE VO 39 %
13 SONNE RE HI 42 %
14 SONNE LI HI 13 %
15 15 Average insolation value between 0 and 125% 26 %
16 16 Carbon monoxide value between 0 and 1023 680
17 17 Nitrogen oxide value between 0 and 1023 200
18 18 Dew point temperature 23.5 Cº
19 max UNTER KÜMLUNG 12.8 K
20 20 Fan output value between 0 and 100% 0 %
21 21 Engine speed 1788 /min
22 22 Ground speed 87 km/h
23 BEL. -DIMMUNG 0 %
24 24 Battery voltage 14.2 V
25
26
27 27 Left hand potentiometer engine speed value between 0 and 100% 100 %
28 28 Centre potentiometer engine speed value between 0 and 100% 0 %
29 29 Right hand potentiometer engine speed value between 0 and 100% 100 %
30 30 Temp of blow air in left rear passenger compartment
31 31 Temp of blow air in left rear passenger compartment
32 32 Temp of evaporator Core in rear passenger Compartment
33 33 Blower voltage in rear passengercompartment
34 34 Specified temperature in left rear passenger compartment
35 35 Specified temperature in right rear passenger compartment
36
37
38 BUILT NR KLA 73
39
40 40 Left hand defroster door value (open/closed plain text at limit stop) ZU
41 41 Right hand defroster door value (open/closed plain text at limit stop) ZU
42 42 Left hand footwell flap value between 0 and 100% ZU
43 43 Right hand footwell flap value between 0 and 100% ZU
44 44 Left hand blend flap value between 0 and 100% AUF
45 45 Right hand blend flap value between 0 and 100% AUF
46 46 Left hand diverter flap 0 and 100% ZU
47 47 Right hand diverter flap value 0 and 100% ZU
48 48 Recirculation door 0 and 100% Frischl.
49 49 AKF bypass flap 0 and 100% AUS
50 50 AAC Software 58
51 51 AAC Hardware 2601
52 52 Software for rear passenger Compartment air Conditioning
53 53 Hardware for rear passenger Compartment air Conditioning
54 54 Software for stepper motor unit 37
55 55. Hardware for stepper motor unit 10
56 56 Software for Centre nozzle 28
57 57 Hardware for Center nozzle 42
58 58 Software for multifunction sensor 19
59 59 Hardware for multifunction sensor 01
60 60 Sofware for daybrightness sensor 32
61 61 Hardware for daybrightness sensor 16
62 REGEL -OFFSET 2 K
63 GEBL. -OFFSET 0.8 V
64
65
66
67
68
69 TUNNEL - MODE Automat.
70 FOLLST. KONTR. Aktiv
71 UL - LOGIK (AKF) Aktiv
72 UL - LOGIK GEN. Inaktiv
73 TUNNEL FUNKTION Aktiv
74 GEBLÄSEBALKEN Generell
75 REHEAT MODUS Inaktiv
76 UMLUFT MANUELL Zeitbegr.
77 DISPLAY Automat.
78 HEISSLAND Inaktiv.
79 MAXCOOL Aktiv.
80 DISPLAY Automat.
81 ABSPEICHERUNG Schlüssel.
82 SCHNELLLAUF Aktiv.
83 UMLUFT 100% Moglich.
84 GEBL. -REAKTION Aktiv.
85 GRUNDEINSTELL Inaktiv.
86 UL-KL. BEI "0" Geschl.
87 GRUNDBELÖFTUNG Aktiv.
88 ESL 20 bar 100% Aktiv.
89 ESL 20 bar 90% Inaktiv.
90 ESL 18 bar 100% Inaktiv.
91 ESL 18 bar 90% Inaktiv.
92 ESL Gndbel. 25% Aktiv.
93 ESL Gndbel. 40% Inaktiv.
94
95
96 Compressor torque (Nm) 9 Nm
97 KOMP STELL 25 %
98 Compressor valve DC current (mA) 270 mA
99 INNER REGLER 26.8 Cº

 

I just did this yesterday

1) hold rest and particle filter buttons down together for about 5 seconds ( ignition on , or engine running)
The air con screen shows "searching"
2) the screen gives you the fault codes. Scroll up and down to see them all using the heat toggle switch.
3) pop out the left and right auto vent buttoms, then press the the left one in first, and then the right one. The system resets.
4) ignition off, then back on again , and the air con screen is back to normal.


I think low freon is code 1241. I have done this to mine about 3 times in the last two days, but the car keeps switching the air con off. Maybe a bit more of a regas is required. The pressure check peformed showed it was ok. Maybe it was joking.

 

1) hold rest and particle filter buttons down together for about 5 seconds ( ignition on , or engine running)
The air con screen shows "searching"
2) the screen gives you the fault codes. Scroll up and down to see them all using the heat toggle switch.
3) pop out the left and right auto vent buttoms, then press the the left one in first, and then the right one. The system resets.
4) ignition off, then back on again , and the air con screen is back to normal.


I think low freon is code 1241. I have done this to mine about 3 times in the last two days, but the car keeps switching the air con off. Maybe a bit more of a regas is required. The pressure check peformed showed it was ok. Maybe it was joking.

Thank you! It worked for me too.
You are right: 1241 is Low Refrigerant. Found out late late last night.
BTW, check this link to see most of the error codes: http://www.benzworld.org/forums/w220-s-class/1218592-intermittent-electrical-issue-w220.html

 

Update on Hidden Menu

Hi All

It has been a while since I have updated my thread but I do have an update that might benefit some DIY's out there.

1 hold down the REST button and Recycled Air Button for about 8 second
2 it brings up a menu with.... what looks like a choke logo(but in fact is the FLAPS!).
3 use the hi or low left (to change item)
4 use the hi and low right (to adjust setting)



NR 00 Closed - All internal air flaps
NR 01 Closed - Defrost Flap - Left
NR 02 Closed - Defrost Flap - Right
NR 03 Closed - Foot Well Flap - Left
NR 04 Closed - Foot Well Flap - Right
NR 05 Closed - Window Flap - Left
NR 06 Closed - Window Flap - Right
NR 07 Closed - Centre Front/Rear Flap - Left
NR 08 Closed - Centre Front/Rear Flap - Right
NR 09 Closed - Recycle Flaps
NR 10 Closed - AKF - By Pass Flaps
NR 11 Inaktiv - Flap calibration
NR 12 0% - Fan Motor Engaged
NR 13 0% - Cold Compressor Engaged

Hope this helps and good luck!

 

Hi All

It has been a while since I have updated my thread but I do have an update that might benefit some DIY's out there.

1 hold down the REST button and Recycled Air Button for about 8 second
2 it brings up a menu with.... what looks like a choke logo(but in fact is the FLAPS!).
3 use the hi or low left (to change item)
4 use the hi and low right (to adjust setting)



NR 00 Closed - All internal air flaps
NR 01 Closed - Defrost Flap - Left
NR 02 Closed - Defrost Flap - Right
NR 03 Closed - Foot Well Flap - Left
NR 04 Closed - Foot Well Flap - Right
NR 05 Closed - Window Flap - Left
NR 06 Closed - Window Flap - Right
NR 07 Closed - Centre Front/Rear Flap - Left
NR 08 Closed - Centre Front/Rear Flap - Right
NR 09 Closed - Recycle Flaps
NR 10 Closed - AKF - By Pass Flaps
NR 11 Inaktiv - Flap calibration
NR 12 0% - Fan Motor Engaged
NR 13 0% - Cold Compressor Engaged

Hope this helps and good luck!

Any idea how to make these values save to the system? Once I adjust them now they reset each time I restart the car.

 

Deleting a fault code will not repair a problem. You must repair the problem, then delete the fault code.

 

hi thanks.
yes, but i did delete the fault code. (i hope that does not creat any problem or incorrectly force the machine/motor to work...plz confirm)

i also found my overhead module indoor temperature sensor wires were broken and with the help of a great post here with pictures, was able to repair that (will post additional helpful pics sometime). it was suggested at some forum that this is also the cause for different temperatures in vents but for me this repair does not seem to help as there is still temperature differential in right and left vents.
also the inoor temperature sensor readings vary a lot ...+/-4 degrees (i.e 22-30, 0 before repair)..dont if it is due to poor wiring job done by me.

i may not reach for duovalve thing...workshop visit seems probable.

thx again

 

Woow this is another unique list! Thanks :bowdown:

 

SirHumphrey Post #26..
You just saved me a bunch of money...!!!

I just bought a 2000 S500 and the AC was out,and shot....
my mechanic replaced the AC and attempted to charge the system but the compressor was not opening due to the fault of the old replaced AC...
He couldn't get the AC EC cleared to fill the rest of the way and told me I would need to go to a dealer for the reset...*shudder*


SO, I just tried your method and heard the compressor open and that "Hiss" was SOOOOOO awesome...

Can't wait to tell him to finish the charge...

Luckily we still haven't hit the high temps yet here in Texas...

 

how? please share what method..i'm new...:surrender:

 

...I was able to get all of the flaps open...I can't tell if the compressor comes on. And I can't get the settings to stay..? Anyone know how to do that?

 

Sorry if I was not clear. 100% is in relation to the flaps levels and or compressor level. Use the left temp control to adjust the flaps. It goes from 1 to 13. Use the right temp control for the adjustment of %.

1 to 11 is flaps
12 is the main engine fan for the ac cooling
13 is the compressor

The settings don't stay. Once the ignition is turned off it goes back to default.
Sometimes when I am in traffic I put no 12 on to cool the engine down as the ac always puts on extra strain but it's up to you.

Hope that helps.

 

Hi everyone, you all are so very helpful and insightful.
hers my issue - similar to theirs

Last year my ac decompressed because my car overheated after i had work done on the car.. (clogged radiator and fans werent working properly). I replaved EVERY component in the cooling system..yes..everything.

Lastly i just replaced the radiator just last week. I Took it to have it tested = np..held amd no leaks. charged it up. But fireguys (the name without naming the shop lol) couldnt get the compressor to kick on (which i also replaced JUST prior to it decompressing and releasing the freon.

I have checked ac fuse, pulled the codes and reset the unit using the rest/climate control method.

First time i came back with code 1279. I reset all the codes.. NO AC/off light EVER was lite and its not now.
AC is blowing hot and the clearing of the codes didnt work. Relays are good.

I DID noticed that one of the NR codes is ( - ) and i havent saw that in any of the posted NR check codes.

Can you give me something else to go on or look for? Im in AZ and its getting killer hot out here. Im a decent mechanic and if i cant manage something..i do i have a goto.

Kla errors<br>
1269<br>
<br>
Nr codes<br>
00 : +35,4<br>
1: + 35,5<br>
2: -40,0<br>
3: + 50, 5<br>
4: + 43,5<br>
5: + 38,0<br>
6: +82 degrees celicus<br>
7: 13, 0 bar<br>
8: 57,5 degrees celcius<br>
9: - 2.9 k<br>
10: 1.3 V<br>
11: 4%<br>
12: 3%<br>
13: 3%<br>
14: 2%<br>
15: 3%<br>
16: 621<br>
17: 700<br>
18: +18.5 c<br>
19: -6,2k<br>
20: 13%<br>
21: 537 -540 /min<br>
22: 0km/m<br>
23: 0%<br>
24: 13.9v<br>

The only code i got was the 1269 the first time when i reviewed the trouble codes. Nothing has popped up since even after letting it run for 5-20 min.

Code 1269 is a communication failure with the multifunction sensor (B31/1). This is located under the hood, on the front of the cabin air intake vent on the left side.

Can you advise as to how i can proceed/where to look? i think i had this code before and it was cleared, and the guy who worked on it got my compressor to work after the install.

Any help would be appreciated. Im burning in AZ hahaha

 

Nr02 is the ambient temperature sensor. -40 I think indicates that the sensor needs to be replaced