33 Differentials
Editorial - F20 M135i long-term review before and after Birds B1 upgrades - Autocar Online - January 2018
"Working with BMW tuners Birds, we’re going to replace the standard, under-specified suspension with much higher-quality Bilstein components tuned specifically for the M135i, we’re going to fit a Quaife limited-slip differential and we’re going to lift power to somewhere approaching 400bhp. We might yet make a few other modifications, too..."
2017 in a nutshell
Testimonial - Quaife LSD - Mercedes W215 CL600 - Mr Mercury
Editorial - F20 M135i Development pt 3 Quaife ATB LSD - Autocar Magazine - November 2017
NEW Mercedes Quaife ATB Limited-Slip Differential – QDF42B
The popular Quaife Automic Torque-Biasing LSD is now available and in stock for the Mercedes 190e models, exclusively at Birds.
Once installed, drivers will notice an immediate difference as the Quaife ATB automatically biases torque across the axle to the wheel with most grip. Unwanted wheel-slip is greatly reduced, enabling drivers to exploit the full potential of their Mercedes for the first time.

