I had two strange concurrent symptoms on my 2008 RL. Recently they're both vanished at the same time, and the only correlation is a had the battery off for a while. Could all this be a clue for RL experts?
1) driver's side map reading light. The light would come on if the lens/button was used...
Here is some diagnostic menu pics from my 2017 RTL-T awd.
I've come to really like the Camera Screen Position Adjustment screen. It lets me toggle between my 2 cameras when I'm parking in a tight spot.
So far the most useful debug feature is disabling driver distraction setting. I turn it on...
I found it from amazon
Launch CReader 3001,here shows $24.99 https://www.amazon.com/dp/B07CH4D68Q/
Launch Launch X431 DIAGUN IV,here shows $549 https://www.amazon.com/dp/B072FHLYRY/
That price is big difference,how to choose it ?