Our 630HP supercharged E39 M5 just got a major upgrade—a Wavetrac differential! How does it transform traction, handling, and overall driving performance? Watch as we install and test this ...

For the 1999 model year, a BMW 5 Series Wagon was added to the United States line-up. A 394-horsepower BMW M5 sedan based on the E39 platform was brought stateside in 2000 propelled by a 5.0-liter V-8 ...