So I’ve now had both the engine and gearbox treatments preformed on my e350 cdi sport, another difference in the smoothness of the car is noticeable the engine pulls cleanly, and the gearbox out performs what I deemed possible from an older auto box changing quickly smoothly and with a satisfying almost unnoticed precision.

I would highly recommend both the services to anyone no matter the miles and condition of the engine you WILL notice a vast improvement.