Recently my ML350 was experiencing what I diagnosed via online research as an EIS (Electronic Ignition Switch) failure. After talking with several companies who did similar work I called and spoke to ECU Pro. After 3 different conversations over the span of a few days the support rep made me feel comfortable on their process to diagnose, repair-replace and return a working EIS switch that would save me over $1k vs my local Mercedes dealer. After sending the required componenets to their repair center I was notified of the diagnosis and repair to working condition again. They were very professional and the timing was actually quicker than quoted which really helped. I'd recommend ECU Pro to anyone who's having similar ignition switch issues.