Several signs indicate potential vacuum pump problems in a Mercedes. If you notice reduced brake assistance, central locking issues, or unusual noises coming from the vacuum pump, it's advisable to have it inspected by professionals. Additionally, a soft or spongy brake pedal, difficulty in unlocking doors, or inconsistent performance of other vacuum-dependent systems may indicate the need for vacuum pump replacement or repair. In Atlanta, GA, you can rely on the skilled technicians at MBT of Atlanta Mercedes Master Techs to accurately diagnose the issue and provide appropriate solutions.