QUOTE (ashok540 @ Jul 11 2008, 11:59 AM)

My E39 already has a band expander fitted to it by the local dealer. However, I find that certain radio stations clash at the same frequency and which station I can hear depends on my location at that moment! Can I use your procedure in this situation to change the area setup?
Yes, if you E39 is made after September 2001 (new generation radio)
If it is prior to Sept 2001 (old gen radio), then the only solution is to swap the Japanese model radio to the European model radio.
What you are experiencing is firm proof that band expanders are crap and they destroy radio performance.
mmm... BMW 540i.... burble burble guzzle guzzle ROARRRRR....