My 05 built in July has a rest button but won't do anything. Do you need to be stopped with engine off? Keys in ignition? What position?

 

I got to the menu with either: key in the on position or the car running and then held the "rest" button in.

 

I was playing around with this yesterday...

To scroll up & down through the list you use the Driver's Side Temperature adjustment buttons. If you press the PASSENGER Side Temp adjustment buttons the values CHANGE and a small vertical bar "|" appears in the center of the display indicating that the value has been modified.

I am not sure why this behaviour is there, but the values can be modified on the display. I am just not sure if they can somehow be saved????? Why would they make them modifiable if they are supposed to be read-only?

 

I found the same thing.
If they are sensor outputs I can't see that you can permanently alter them - unless you're adjusting the zero point for that sensor.

 

Was that a July'05 build? Mine is a Feb '05 with no rest button. Part of the trade-offs I guess.

 

Sorry I was wrong, July 04, the first month of 05 production.

 

Anyone find this out? Wonder what 41 thru 99 are for. Quite a handy little hidden feature.

 

I have a W210 E55 with a rest button. Does this apply?

 

Not sure, try it...just hold the 'rest' button down for about 5 secs with ignition on or engine on.

Found this and translated it with babelfish so its a bit ???

01 - Temperature sensor interior air with ventilation blower of
02 - temperature sensor outside air
03 - temperature sensors heat exchangers of
05 - temperature sensor evaporator
06 - temperature sensors cooling agent
07 - refrigerant pressure in bar, e.g.. ' 06°4 ' = 6,4bar of
08 - temperature sensors refrigerants, e.g.. ' 23°9 ' = 23,9°C
09 - exact speed without Tachoabweichung
10 - blower expensive tension of ' 08°0 ' to ' 60°0 ' = 0,8V to 6,0V
11 = emission sensor (B31) e.g. 3,1 = 31.v
12 = sunning and sensor 4,2 = 4.2v
20 = auxiliary cooling fan price increase 6,1 = 6.1A (max 10A)
21 = engine speed 1/min*1000
22 = Fzg speed km/h without Tachoabweichung
23 = electric circuit 58d e.g.. 99 = 99% of battery voltage,
24 = BATTERY VOLTAGE e.g. 12,5 = 12.5v 40 = tax module version software-Version
41 = tax module version menu hardware version
42 = tax module VarantenCode 1. Number of
43 = tax module VarantenCode 2. Number of
52 - Temperature desired value
54 - Refrigeration compressor EMERGENCY STOP
60 - roof: OPE=offen, CL0 = closed (only with Cabrio R 129!!! )
61 - Side nozzle left, knurling tool potentiometer tension, e.g. 2,9V, being 0,6-0,9V too, 4,0-4,5V to
62 - negative pressure element 46, reconducting potentiometer, e.g. 0,9V, being 0,7-1,1V too, 3,5-4,8V to
63 - centre outlet, knurling tool potentiometer tension, e.g. 2,9V, being 0,6-0,9V too, 4,0-4,5V to
64 - negative pressure element 47, reconducting potentiometer, e.g. 0,9V, being 0,8-1,2V too, 3,5-4,5V to
65 - side nozzle right, knurling tool potentiometer tension, e.g. 2,9V, being 0,6-0,9V too, 4,0-4,5V to 66 - negative pressure element

 

Same here. I tried to hold on to the "OFF" button...nada.