I just purchased my first pickup, a used 2017 RAM 2500 with the diesel engine, Larime trim, and am loving it so far. I intend to use this truck for hauling a trailer. When I hit the exhaust brake I get this message on my dash screen that the exhaust brake is not available. When I chatted with the dealership, I was told that I do have an exhaust brake on my truck but that it's not "ready" to be used, hence the message. This information seems to suggest that the truck needs to be in a particular condition of use before the brakes become available. However, I notice that when I hit the button for the exhaust brake, that I'm not getting a yellow light on the instrument screen to indicate that it's turned on as per the manual. And where I have seen this issue discussed in forums I'm not seeing this as an issue. So, if you could help me out here, I'm thinking I'm not getting good information from the dealer, but any advice would be useful. Thanks!