Automatic transmission (AT), location of hydraulic components - GF27.10-P-0001-09GZ

Transmission 722.9 in model 164.1/8, 204.0, 216, 221, 251.0/1 

Valve housing 

Fig 1: Identifying Top View Of Valve Housing

Courtesy of MERCEDES-BENZ USA

Valve body 

Fig 2: Identifying Top View Of Valve Body

Courtesy of MERCEDES-BENZ USA