Hi I'm also looking for help with installing a double din in an is250. I have already did all the modifications to dash and mounted the unit. I cannot figure out the wiring at all. If anyone knows how to wire in an aftermarket head unit without running new amps and speakers please help me out. I know the factory head unit has to stay plugged in to keep ac controls functional. The aftermarket unit works great until you plug the oem unit in at the same time, then it sounds bad and the ac stops working again. I can help anyone who needs to know what to expect with the dash mods. If anyone can help me with the wiring I'd appreciate it.
Here's where I'm at. I removed the oem radio display and relocated hazard lamp panel to that location to get rid of the useless radio display and utilize the space for a more important component. It's different but I'm happy with it. The paint is temporary until I get everything working then I will break it back down and use real base coat to match better.
