E2 - Check Fluid Level In the Master Cylinder

- Check the brake fluid level at the brake master cylinder reservoir (2K478).

- Is the fluid level within specification?

YES -- Go to E3. [1][2]E3 - Verify Float Buoyancy

NO -- Check for leaks in the vehicle brake system and repair as required. Fill the brake master cylinder reservoir to the required level. Repeat E1. [1][2]E1 - Check Proper Function of Brake Lamp