1) Is it actually worth going to legit Lexus dealers to get it serviced? I know I won't get Encore on a used car, so what's the point, right?
Depends on how much you think you would save. Lexus servicing isn't as bad as other cars. Ask yourself if you woul go for a car with a Lexus service history over one without and you may answer if it is worth it to you.
3) If I wanted GPS map updates, I just buy a new disc, correct? Yes, you can save money if happy with a version older by buying it off eBay. Plenty of 'how to' docs to install the disc on the net.
4) How much are spare keys? Around $700...make sure you get 2 when you purchase your car.
5) What's everyone's thoughts on tinting? It already has an electronic rear blind as far as I'm aware. Personal preference.
6) Average petrol consumption / kms per tank - around Sydney I suppose? I used to get about 10l/100 in Melbourne.
7) Any particular niggles or issues common to the car? Vvti controller start up rattle, some persistent rattles, SL has a firm ride alongside a quiet cabin makes rattles very noticeable. I have heard of high oil use on older engines.
8) Is the Radar Cruise control thing a gimmick or actually useful? Do you find yourself using it? I don't think it brings the car to a complete halt though? I found it very useful but did not have the nerve to test it to a complete stop!
9) Where do you keep the key, since there's no ignition? Just in a pocket...anywhere you like really.
10) What's the deal with this smart key emergency card thing? I didn't have one on my car. If the battery in you key is dead, a physical key is in the fob and to start you touch the start button with the fob.
(http://liveimages.carsales.com.au/carsales/car/private/cp5033804367355574718.jpg)
And finally, once I do end up setting my heart on a car, I definitely plan to do all those REVS / RTA / PPSR checks, and maybe even an NRMA inspection if I really think something's up. I'd also check the logbooks to hope that at Lexus dealer has been doing everything.
Apart from all the basics - is there anything else I should be particularly mindful of?
The SL has a great deal of tech...if something goes wrong, can be expensive. Replacement audio/gps units are expensive..make sure you test the screen and cd mechanism is all working.