the rar contains the image to write the firmware CD. Note that 7.11 is only one CD (7.10 was on 2 CD's).
anyway, the first rar contained 10 pieces of 50 mb and had some issues...
The new version of the rar only has 5 pieces of 100 Mb and should be problem free, as long as you use winrar to decompress and burn the image at slowest speed possible. Further on, while updating, leave the engine running (so the car won't go into ecomode) and release the SIM-card (so you can't receive a call during the update). After the update do a "dark reboot" (keep pressing the 'dark' button during 10 seconds).
part1 part2 part3 part4 part5
The only issue we noticed after installing the 7.11 update was that the SUAL LED stays red... But the emergency call works fine.
grtz,
Bondbelgium.