How do you refill the brake fluid in a BMW 745li?

To refill the brake fluid in a BMW 745Li, first ensure the vehicle is parked on a level surface and the engine is off. Locate the brake fluid reservoir, which is typically found near the back of the engine bay, near the driver's side. Remove the cap and check the fluid level; if it's low, add the appropriate type of brake fluid (usually DOT 4). After refilling, securely replace the cap and check for any leaks before driving.