In a 1988 Mercedes 190E what does the automatic transmission modulator do?

In a 1988 Mercedes 190E, the automatic transmission modulator is responsible for adjusting the transmission's shifting characteristics based on engine load and throttle position. It helps ensure smooth and timely gear changes by controlling the hydraulic pressure within the transmission. By modulating these pressures, it allows for optimal performance and efficiency, enhancing the driving experience. Issues with the modulator can lead to harsh shifting or slipping in the transmission.