So, I had to replace my front brake calipers on my '82 300 TD because they had rusted. After putting on new rubber brake hoses and new front brake calipers I of course bled the brakes. However, I got in the car and pumped the brakes last night and noticed that the brake pedal and after a few seconds the pedal would fall to the floor. Do you think that there could be some air still trapped in the brake line somewhere, or is there something else that I should check.