The rear mount consists of the upper bracket that bolts to the engine timing cover, and the lower bracket and backup plate that sandwich the sheet metal of the van at the rear behind the bumper. Bumper removal is required for install.

The original cantilever mount setup is fine without the rear mount *if* the bellhousing is free from corrosion and in good shape. If the bellhousing condition is questionable, or heavy duty use (hard acceleration, off-road etc) is indicated then the rear mount is a good idea.  The rear mount also allows "tuning" of the transmission and engine mounts in terms of loading for complete control. Lowered NVH (noise vibration and harshness) can be a benefit by playing with the multiple adjustments possible.

Read the install doc here

Compatible with mounts:

• For Mercedes-Benz C230/C280/C350/E350 2006-2007, C43 AMG 1998-2000, CLS55 AMG/CL500/CLS500 2006, CL55 AMG/E500/SL500 2003-2006, E63 AMG/CL550/E550 2007-2009, CL63/S63 AMG 2008-2010, CLK350 2006-2009, CLK430 1999-2003, SLK55 AMG/SLK350 2005-2011
• For Mercedes-Benz CLK55/S55 AMG 2001-2006, CLS63 AMG/CLS550/S550 2007-2011, E320 1998-2008, E430 1998-2002, E55 AMG 1999-2006, S430/S500 2000-2006, SL55 AMG 2003-2008, SL550 2007-2012, SL63 AMG 2009-2012, SLK280 2006-2008, SLK300 2009-2011