Shanno

I have a 2009 Cl63 AMG and Im getting the alert to not shift; the last time I drove it I couldnt get it outta gear without restarting it a few times...My AC comes on when not warranted-I figure its the small battery that supposedly goes into the dash but I dont see the original... maybe its behind the seat. Anyway is this a no brainer or could it be the ECU?

Plutoe

why guess get a good transmission scan