A method for operating a motor vehicle drivetrain with at least an automatic transmission and a drive motor. Specific methods encompass the administration of an immunomodulatory compound alone or in combination with a second active agent. An ECU determines whether the EGR device is in operation or not. The pushing cylinder and the discharge pin are used with a spring for continuous firin . The assembly comprises an unobstructed region where an individual maneuvers a training member through the unobstructed region.