I bought a used MS6 in November and when I bought it, this thing came with the keys. I thought it was an engine immobilizer, but the other day I forgot it at home and drove to work. My work is 7 miles away so I doubt its that. It has no buttons on it, so it does not seem like a Remote Start system.
Dommo, I brought my car in for an oil change today and this is what I am talking about.




