[scchang]

Are these a part of the standard or multi-funtion seats?

 

[Ashok Arora]

Definitely included in 4MA multifunction seats.

Not sure if they are with the standard sports seats though.

 

[cidair]

Only with the MF seats.

 

[Kelly777]

What do they do?

 

[hal2000]

the head rests advance forward in the event of a collision so there is less chance of whiplash injury

 

[Ashok Arora]

Read more here:

http://www.newcarnet.co.uk/safety_BMW_M5.html?serialno=26679