Honestly call mce back. It depends greatly who you talk to. I once had a weird issue on a group of iboxs. I went over everything imaginable on those cars. Once a month a car would go in the overhead at night onto the final. No faults. Put it back it would run perfect. Probably would be a different car next time. I ended up calling mce 4 ot 5 different times talking to someone else each time. The first 4 times? No help. The 5th guy that called me im driving down the road explaining this to him thinking he's just gonna shrug his shoulders when he says "oh yeah, that's a known software glitch we had related to parking, ill just send you updated software" literally took mce 6 months and 5 people to tell me that. In a perfect world that woulda been on the first phone call
