What does a circle with 3 dots either side of it mean on a Mercedes 190e on the dash board?

The circle with three dots on either side, commonly referred to as the "brake warning light," indicates a potential issue with the vehicle's braking system. This could mean that the brake fluid level is low, there’s a problem with the anti-lock braking system (ABS), or there might be an issue with the brake pads. It's essential to inspect the brake system promptly to ensure safe driving. If the light remains on, consulting a mechanic is advisable.