I yanked out all incandescent interior bulbs and replaced with energy savings LED's. I was very careful to maintain the warm white ambience, so I made sure that all of my upgraded LED are of 2300K. To my utter surprise, all the lights are of T10 socket type, which exception of main rear seat which was a 41 mm festoon socket. I don't have a sun roof so my interior rear lighting consist of a large 10 mm festoon and two t10 wedge reading lights. I am very happy to say that there is absolutely NO flickering of lights, i.e. there is no CAN bus error. Maybe this due to the fact that GLA was developed by Nissan-Renault rather than a pure breed MB !!! My next project is to yank out the yellowish H11 fog lights, and upgrade the OEM bi-Xenon's to 6000K. The foot well got blue white stock LED's.