The results are mixed, but the idea is that it behaves a lot like a hydraulically - activated manual transmission once you're moving, but gives you the advantages of slushbox torque multiplication from a dead stop. (speedsportlife.com)
The C63 uses the same seven - speed automatic found in every other Mercedes with fewer than twelve cylinders, except that AMG unbolts the torque converter — that's the source of the «slush» in slushbox — and installs a direct - acting clutch pack in its place. (automobilemag.com)
The six - speed slushbox doesn't react promptly to manual inputs, preferring a prod from your right foot. (thetruthaboutcars.com)