MDM euro Coding

[Jorgem2009]

Originally Posted by slavearm

After resetting TPMS this morning (no issues with the eurospec that was set thankfully), I decided to drop her into MDM mode. Let me tell you, it is significantly more aggressive! Just the way I honestly thought it always should be. The difference between US MDM and US full TC is almost non-existent. With the EuroMDM there is a distinct difference between the two. As previous posters have eluded, it is definitely easier to get sideways. The MDM still will catch you if you go around hooning into stupidville, but otherwise is much less intrusive.

did you do the coding yourself?

[coolmody]

Originally Posted by Realw5

I recently updated my F82 M4 to the euro MDM spec, and I must say I love it thus far!

One thing I did notice and wanted to see if others noticed was my calculated values where NOT the same as the US spec listed in this thread. I presume it may have to do with the car in reference being an F83? I wonder if that means these values are adjusted by model F80, F82 and F83. Does anyone have their original US MDM settings to compare, and even better yet a euro F82 to compare to?

F82 M4 Original Settings:
C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 01, 10 (Calculated value)
C_Codierdatum => Werte = 14, 07, 31 (Calculated value)

Here's the original values from a Canadian F82 I did recently.

F82 M4 Original Settings:
C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 01, 10 (Calculated value)
C_Codierdatum => Werte = 14, 08, 08 (Calculated value)

And another Canadian F82 I did afterwards. Notice the difference in the calculated values, even with the same car (both F82, but different options)

F82 M4 Original Settings:
C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 01, 10 (Calculated value)
C_Codierdatum => Werte = 14, 09, 22 (Calculated value)


I just assumed that since these were "Calculated" values, that they would differ. I thought it might have to do with driving style?

[Pauly Walnuts]

My M4 was "C_Codierdatum => Werte = 14, 09, 22"

On another note, anyone considering the Euro MDM, do it. It's significantly more enjoyable than the USDM settings.

[Brady1984]

There is a big thread going on about this on the General Forum, http://f80.bimmerpost.com/forums/sho....php?t=1045504 I am thinking about it but getting into chassis control is pretty serious business unless you really know what you are changing. It has been a while since this thread started and I have not seen anyone breakdown what the values actually mean, does anyone know now? I don't want to mess with Euro MDM unless I have all the facts.

[JNoSol]

I just pinged BPMSport. Let's see if they can help with Euro MDM coding. I really need to see if someone can do this for me before selecting wheels/tires.

Apparently if you run a square setup (or any setup that the front and rear have the same rolling diameter), our MDM goes crazy. The stock rear is 2.6% larger than the front. Running square setup makes the computer thinks the back wheels are slipping, as they would has the same rotation as the front.

[CanAutM3]

Originally Posted by JNoSol

I just pinged BPMSport. Let's see if they can help with Euro MDM coding. I really need to see if someone can do this for me before selecting wheels/tires.

Apparently if you run a square setup (or any setup that the front and rear have the same rolling diameter), our MDM goes crazy. The stock rear is 2.6% larger than the front. Running square setup makes the computer thinks the back wheels are slipping, as they would has the same rotation as the front.

It will be just the same with Euro-MDM and a square setup. People might feel it less because Euro-MDM is less intrusive, but it will still intervene more with a square setup than it would with a standard stagger.

I coded Euro MDM. It is much less intrusive and much more enjoyable for street use, but I still find it gets in the way at the track.

[CanAutM3]

Originally Posted by coolmody

Here's the original values from a Canadian F82 I did recently.

F82 M4 Original Settings:
C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 01, 10 (Calculated value)
C_Codierdatum => Werte = 14, 08, 08 (Calculated value)

And another Canadian F82 I did afterwards. Notice the difference in the calculated values, even with the same car (both F82, but different options)

F82 M4 Original Settings:
C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 01, 10 (Calculated value)
C_Codierdatum => Werte = 14, 09, 22 (Calculated value)


I just assumed that since these were "Calculated" values, that they would differ. I thought it might have to do with driving style?

Just speculating, but that second calculated value could be the "coding date" in yy, mm, dd format.

[Warranty P]

Originally Posted by CanAutM3

Just speculating, but that second calculated value could be the "code date" in yy, mm, dd format.

That would certainly make sense. Does it have to be changed is the question now.

[CanAutM3]

Originally Posted by Warranty Pussy

That would certainly make sense. Does it have to be changed is the question now.

I don't think calculated values need to be changed.

But don't take my word for it, I am a total newbe and layman regarding coding .
Maybe experts can chime in.

[Warranty P]

Originally Posted by CanAutM3

I don't think calculated values need to be changed.

But don't take my word for it, I am a total newbe and layman regarding coding .
Maybe experts can chime in.

Yep common sense would indicate that those values need not be changed but you never know.

[coolmody]

Originally Posted by CanAutM3

Just speculating, but that second calculated value could be the "coding date" in yy, mm, dd format.

I put it though Google translator and you are onto something.

Codier = Coding
Datum = Date

I left the values as is and the Euro MDM is working on both cars even with different values.

[castilla]

Originally Posted by karussell

Yes, I believe all of the euro delivery cars had euro MDM because of the significant slip angle they allowed on Spa.

Does Turkey cars come with Euro MDM ? DOes anyone have any information about that

[CanAutM3]

Originally Posted by coolmody

I put it though Google translator and you are onto something.

Codier = Coding
Datum = Date

I left the values as is and the Euro MDM is working on both cars even with different values.

My Austrian descent kinda gave me a little advantage with the translation

[nicknaz]

Hey guys, for members who posted values for the C_Werksnummer and
C_Codierdatum could you please let us know your tire size and tread depth of mileage driven?

One GUESS that I have for why there is a difference is that the factory 18s and 19s have a different relative diameter (i.e. on the 18s the rear tire is +2.7% larger diameter but on the 19s the diameter difference is +2.3%)

As a forum we've posted elsewhere that the electronics are activated by differences in rotational speed so my GUESS is that these are calibration values to let the computer know what size of tire is equipped and MAYBE a calculation factor for the wear.

The reason I am curious is that I would like to use a either a square 275/40/18 setup or staggered 275/35/18 front and 295/35/18 rear (if I can get over the added wheel gap....) and if we could figure out if these are really calibration values when perhaps we can fine tune the euro MDM based on the non OEM tire sizes we are using

[CanAutM3]

Originally Posted by nicknaz

Hey guys, for members who posted values for the C_Werksnummer and
C_Codierdatum could you please let us know your tire size and tread depth of mileage driven?

One GUESS that I have for why there is a difference is that the factory 18s and 19s have a different relative diameter (i.e. on the 18s the rear tire is +2.7% larger diameter but on the 19s the diameter difference is +2.3%)

As a forum we've posted elsewhere that the electronics are activated by differences in rotational speed so my GUESS is that these are calibration values to let the computer know what size of tire is equipped and MAYBE a calculation factor for the wear.

The reason I am curious is that I would like to use a either a square 275/40/18 setup or staggered 275/35/18 front and 295/35/18 rear (if I can get over the added wheel gap....) and if we could figure out if these are really calibration values when perhaps we can fine tune the euro MDM based on the non OEM tire sizes we are using

I have already posted this in the track section, but will repost here as it is pertinent to this thread too.

I checked the PSS diameters on the Michelin website and they are 661mm/677mm for the 18" and 661mm/675mm for the 19". So the rolling radius of the rear 18" is only 1mm larger than the rear 19". That is negligible IMO and well within tire wear variation (thread depth is 7mm).

Therefore, I don't believe there is a DSC/MDM calibration difference between the 18" and 19" wheels.

[nicknaz]

Originally Posted by CanAutM3

I have already posted this in the track section, but will repost here as it is pertinent to this thread too.

I checked the PSS diameters on the Michelin website and they are 661mm/677mm for the 18" and 661mm/675mm for the 19". So the rolling radius of the rear 18" is only 1mm larger than the rear 19". That is negligible IMO and well within tire wear variation (thread depth is 7mm).

Therefore, I don't believe there is a DSC/MDM calibration difference between the 18" and 19" wheels.

Got it. good call on the tire wear variation. thanks.

[JNoSol]

Originally Posted by shawnsheridan

I coded an F83 M4 DSC module for Europe and then back to U.S. and compared them, and these are the coding differences:

U.S.:

C_Laenderkennung => US
CTpmsMarket => US
CPrewarnEnable => disable
CPrewarnIgnition => disable
CalLrPDevMax => 100kpa
CPInitRangeMax => 200kpa
UiaSetLevelPc => 25%
UiwSetLevelPc => 20%
C_Werksnummer => Werte = 06, 10 (Calculated value)
C_Codierdatum => Werte = 14, 08, 04 (Calculated value)

EUROPE:

C_Laenderkennung => ECE
CTpmsMarket => EU
CPrewarnEnable => enable
CPrewarnIgnition => enable
CalLrPDevMax => 50kpa
CPInitRangeMax => 80kpa
UiaSetLevelPc => 20%
UiwSetLevelPc => 15%
C_Werksnummer => Werte = 12, 34 (Calculated value)
C_Codierdatum => Werte = 14, 11, 23 (Calculated value)

I changed everything except for the last 2 lines. I believe the last 2 lines are just dates.

[CanAutM3]

Originally Posted by JNoSol

I changed everything except for the last 2 lines. I believe the last 2 lines are just dates.

How does it feel?

[JNoSol]

Originally Posted by CanAutM3

How does it feel?

Haven't drove it yet, it's pouring out. Will write something up once I have a feel of it. I went code crazy all morning.

[JNoSol]

Originally Posted by CanAutM3

How does it feel?

Euro MDM hands down make the car so much more enjoyable to drive. It allows more wheels slip, tire chirp, before it intervenes. I took the car out to an off beaten path, the tail kicks out like crazy on 2nd/3rd gear. You can't drive with one hand with Euro MDM, that's for sure.

[Cajun1]

Thanks for posting your impression, I'm going to have this done very soon and report back.

[04cobra]

Does it makes sense to wait until after the 1200 mile service to code it to Euro spec? I don't want them coding it back or reflashing it (not sure how the coding works yet) while in for the 1200 mile service