shahzadsl55

Hi everyone, i had some problems with my lowering module that i got installed. The brand is renntech and it is installed on my sl but while i was driving the abc (see dealer) sign came on the screen. I didnt install the module by the mercedes dealer so does that void my warrenty? But then i started the car after couple of days after the weekend and the sign didnt come on again. It comes and goes so what do you guys think this is. Did anyone experience the same problem.