Hi Bob,
Thanks for your post. Before I posted my query I read through all the previous posts on this topic; there were quite a few! Hence I was aware of the potential tracker problem. I do not know if my car has one, however, I bought a new 750MA battery soon after buying the car and since my last post bought a CTEK MX5 5.0 battery charger so I could effectively properly recharge my new beast of a battery.
I am now monitoring the current drain and voltage across the battery terminals without using the car so I can effectively see how many days the car can be left before the battery cannot turn over the starter motor. If it is greater than a week that would be ok as the car was bought for summer weekend use or for holidays where it would be in daily use. When sitting at home in the garage I would just leave the charger connected and it would trickle charge the battery. Thanks for your advice re battery alarm back up, I will check this out.
As far as the reflector is concerned I have already trawled through eBay without success. I have recently been in touch with my nearest Lexus dealer to see if they could procure one for me.
Cheers.