With CODE (527) COMAND APS with single DVD drive (with navigation system) & CODE (498) Japanese version - GF82.85-P-3134RCJ

MODEL 171 as of model year 09/YoM 08 model refinement package 

Location  The COMAND controller unit is installed into the center console.

Fig 1: Identifying COMAND APS With Single DVD Drive

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying COMAND APS With Single DVD Drive

Courtesy of MERCEDES-BENZ USA