Hi all. Seems I have a problem with my brake system . I have a 2008 sprinter without steering wheel controls. The Red brake light went on last week ,after which I checked the brake fluid , checked the ebrake. Changed the rear discs , checked the calipers to make sure they’re functioning, checked the bake pad sensors, checked the u joints on the driveshaft . Also had all the wheels balanced. And still it’s on. I have a generic scanner which I knew would tell me nothing . The vehicle brakes fine so it’s confusing. Also I don’t have a trailer or hitch. And there is no buzzer that sounds. The service manual seems to point to ebv system malfunction but I’m not sure what else to check. Any ideas would be much appreciated. Thanks gents.