[Blackers]

Does anyone know how this works? Is it something a dealer needs to set up?

I have just changed from my winter to sumner tyres and was setting them up on the screen, I went for the manual option and selected the right size for the rears. The automatic option intrigued me.

[Karl V]

It does say that auto can only be programmed by a Service Partner. Maybe they blip barcodes and what not to set it (?)

[Karl V]

I did get intrigued through by the Load Status though.

Seems 'Fully Loaded' means vroom vroom rather than 'carrying the In-Laws in the back'???

[ukbeemerboy]

If you buy a 3 series in a Germany, they come supplied with a winter set up. This will be configured in the iDrive at PDI and then the car will determine between the two because it’s been told what to expect.

[jd85_m]

Originally Posted by Karl V

I did get intrigued through by the Load Status though.

Seems 'Fully Loaded' means vroom vroom rather than 'carrying the In-Laws in the back'???

For me on a G20 it gives the following recommendations in bars (on the current outside temperature and for a 225/50 R17 98Y):
- Comfort: 2.2 front, 2.5 rear
- Eco: 2.7 front, 3.0 rear
- Load: 2.6 front, 3.1 rear

[Charlie (Wessex)]

Mine quite often say 2.7/2.8 bar which is 39/40 psi. Michelin say pressures should be 36 psi.

Do you go with BMW or Michelin? At one stage, BMW recommended inflating to more than the max pressure on the tyre sidewall, so I've stuck with Michelin's recommendations.

[HighlandPete]

Originally Posted by Charlie (Wessex)

Mine quite often say 2.7/2.8 bar which is 39/40 psi. Michelin say pressures should be 36 psi.

Do you go with BMW or Michelin? At one stage, BMW recommended inflating to more than the max pressure on the tyre sidewall, so I've stuck with Michelin's recommendations.

Are you quoting cold setting pressures, or real time running pressures?

36psi (cold) will be 39/40psi when up to running temperatures.

[Charlie (Wessex)]

Originally Posted by HighlandPete

Are you quoting cold setting pressures, or real time running pressures?

36psi (cold) will be 39/40psi when up to running temperatures.

Cold settings.

[HighlandPete]

Originally Posted by Charlie (Wessex)

Cold settings.

Your door jam plate is recommending 2.7/2.8 bar for normal use???

[paulockenden]

Originally Posted by HighlandPete

Your door jam plate is recommending 2.7/2.8 bar for normal use???

That's not unusual.

[paulockenden]

Having said that, my door plate is completely at odds with what the iDrive recommends. The latter has very similar pressures whereas the door plate shows the rears a fair bit higher.

[HighlandPete]

Originally Posted by paulockenden

Having said that, my door plate is completely at odds with what the iDrive recommends. The latter has very similar pressures whereas the door plate shows the rears a fair bit higher.

iDrive is recommending real time pressures. Door plate cold settings. Is this not 'adding up' to about 3 - 5psi extra pressure, when tyres are up to working temperature/pressure?

There does appear some logical reason for some unexpected pressure recommendations from the sample door plate. The use of XL tyres is part of it. Is the iDrive menu giving options for standard and/or XL tyres?

[HighlandPete]

Originally Posted by paulockenden

That's not unusual.

The use of the 19" 93Y XL @ 2.7bar, makes sense to be a high pressure. I've not calculated the xDrive front axle loading, but BMW may be recommending the 2.7 on the 93Y XL, simply on the L.I. capacity, for a given pressure.

[paulockenden]

Originally Posted by HighlandPete

Is the iDrive menu giving options for standard and/or XL tyres?

My car specifies extra load tyres only.

[Charlie (Wessex)]

Originally Posted by paulockenden

That's not unusual.

That's the one.

51psi!!! My tyres say max of 45psi IIRC - it's late and dark so not going to check, but know 51 is over the max.

Tyres are non-RFT Mich PS4S star marked