PSE control module (combined), location - GF80.20-P-4106-01B

Model 210 

The PSE control module (combined) (A37)  is located under the rear bench seat next to the battery (G1). It is located in a foam support.

Illustrated on model 210 sedan

Fig 1: Identifying PSE Control Module (Combined) Components Location

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.