Hello everyone. I've had my GLA250 sport premium for just over a week now and I must say that I'm pretty impressed by Mercedes after switching from Infiniti but... I do regret not going with the premium plus model with the LED bi xenon options. Being pretty handy (or so I'm led to believe ) is this an upgrade thats pretty straight forward? As in buying the proper parts and switching them or is it more complicated? Any help or advice would be greatly appreciated. Thanks in advance