I have and the difference is night and day! Just changing the festoon bulbs in the overhead made a dramatic difference. The light is brighter and whiter, not amber like the old bulbs. I really like it. I put in 16 LED SMD festoon bulbs I got on ebay. Since they are interior lights they don't trip the bulb failure modules. Next I plan to do the lights in the doors and the headrests. Its a nice change and cheap too.

 

That sounds nice, don't forget the pics , if you need help check in X300 Forums Oubadah tackled with LEDs as well

 

Sounds good, Mule. The cabin is certainly not suffering from an abundance of brightness! Still, for me personally, I kind of like the dim movie-theater-amber glow of the inside of my car. Puts me in the mood for a g & t.
Scott

 

At the moment, the car is getting a diff. put in and the suspension changed to standard from SLS. I'll get some pics up as soon as I can. Hopefully this weekend. Also hopefully, I'll have some before and after window tint pics too!