Multiple-Cone Synchronization, Function

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2005 Mercedes-Benz SLK350, 2005 Mercedes-Benz C320, 2004 Mercedes-Benz SLK320, 2004 Mercedes-Benz SLK230, and 2004 Mercedes-Benz C320. However, it is still accessible from the selected car via links, so may be relevant.

Triple Cone Synchronization In 1st/2nd Gear:

Triple cone synchronization is used on transmission variants SG-S 370 and SG-S 400.

An additional conical ring (3) between the friction ring (4) and the synchronizer ring (6) and a friction lining (5) attached to the friction ring (4) are the essential components. The friction surfaces are increased here by having the synchronizer rings stepped inside each other, causing the loose gears (1 and 2) to be braked or accelerated more quickly or with less force applied.

Fig 1: Identifying Triple Cone Synchronization 1st/2nd Gear (SG-S370 & SG-S400)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Double Cone Synchronization

Double-cone synchronization is used for synchronization on transmission variants SG-S 250 and SG-S 270 in gears 1 to 4 and on transmission variants SG-S 370 and SG-S 400 for gears 3 and 4. The friction lining attached to the friction ring (4) is no longer used.

Fig 2: Identifying Double Cone Synchronization Components (SG-S250 & SG-S270)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.