A little goes a long way.

The variable M differential lock
on the new BMW M3 Coupé.

A little extra traction can make all the difference, and the torque-sensitive, variable M differential lock identifies exactly when traction is needed. Even when wheel grip varies enormously, such as on bends taken at high speed, roadholding remains excellent as the locking power between the left and right rear wheels can be raised to 100%. Drivers who expect the most from their cars know what this feature delivers: it optimises handling, improves safety and enhances the thrust provided by the BMW M3 Coupé's rear-wheel drive.