I took my GLA45 into the dealership, after accidentally engaging full emergency stop (just pushing it too hard I think) at Sonoma, to see if something was damaged. They told me it was all good. Then I got its regular service done not long thereafter. Two track days later, after T-Hill and Laguna, I definitely think something is up with the brakes or suspension components. It sounds like the car is hitting the ground on certain bumps and the brakes will grab at the same time as the traction control light flashes.