Reilan Govender

Hi guys I have a 2003 c32 amg, the cars on limp mode, the only thing I've done to the car was put an external gearbox oil cooler since I had oil in the water bottle other than that she's got exhaust headers induction, what could be the possible reasons that the car is on limp mode? And also what are the symptoms of a leaky supercharger intercooler? Without opening the intake? Thanks guys....