Hi all

I REALLY hope some good person(s) on here can help me. A few weeks ago I attempted to upgrade my Mk III satnav to a later firmware version but due to a combination of poor CD/dodgy drive I ran into all types of problems so gave up and bought a Mk IV unit off EBay.

Got it in and running, worked fine. A couple of weeks ago bought the 2007-1 UK/Europe Map DVD with Speed Cameras, has worked a treat since.

Today though, deja vu I attempted to upgrade the firmware to ver28 (was on ver 27) and it went wrong.

Unlocked the car, waited for things to stabilise then turned ignition to position 1. Ejected the Map DVD and inserted the firmware CD. After a couple of minutes of blank screen it came up with the familiar "Software is being installed...this will take 6 minutes...do not turn off ignition" message so I waited a while then got a screen stating "Defective CD in drive, please eject and click OK" Went to the drive and it had already been ejected, clicked on the right-side button on the front unit and after a short while, blank screen.

I left the car ignition in the same place and re-inserted the Map DVD. Nothing, not even the red "activity" light on the drive.

Afer leaving it quite a while I ejected the map DVD and inserted an older firmware version CD (ver27) but still nothing.

Eventually, I turned off the ignition and turned it back on, now have the light blue screen that has the other options (TV, Computer etc) but NO SatNav. Subsquently I've tried both ver27 and ver28 CD's but get nothing, not even the activity light on the drive.

Feel really bad because very similar happened that led me to upgrade to a Mk IV drive and only tried the upgrade because I thought a) it surely can't happen twice and b) DVD-based units are supposedly much more resilient to that type of problem - obviously wrong on both counts

Can you please suggest what to do? I read once somewhere that a battery disconnect/reconnect is a good place to start but I'll be honest and say I don't even know where the battery is on the X5.

Seriously thinking of ringing the dealership Monday morning and asking them to fix/ugrade firmware as I seem to have had no luck in doing it last 2 times but not sure how picky they'll be after an attempt to do it off a 'backup' CD bought from Ebay has caused the initial issue.

Sorry for the long posting, wanted to get all the details in there, your help would be very much appreciated.

ALI