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Home >> Mercedes Benz >> 2021 >> CLA45 AMG >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Seats, Bunks, Restraint Systems (1 Of 2) -- 118 Chassis >> Basic Knowledge >> Massage Function Control Unit, Basic Function - GF91.25-P-9891A
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Massage Function Control Unit, Basic Function - GF91.25-P-9891A

Model All (CAR) 

with code 399 (Front multicontour seat with massage function) 

Model All (CAR) 

with code 406 (Multicontour rear seat) 

Model All (CAR) 

with code 432 (Dynamic seats left and right) 

Overview 

This document contains information on:

General 

The massage function control unit performs the following tasks:

Function requirement 

Function 

The massage function control units contain integrated valves to supply air to the massage bladders. Targeted actuation of the air bubbles can be used to implement various massage programs depending on equipment installed. For example:

Designation Note
Wave Massage Regenerating massage thanks to massage waves over the back and in the seat cushion.
Pulsating Massage -
Relaxing Massage Relaxing back massage due to ascending wave movements and subsequent spreading movements.
Activating massage Invigorating massage by means of upward waves of massage.
Classic massage Relaxing back massage.
Mobilizing massage Mobilizing massage by means of upward waves of massage. Can promote slower, deeper breathing. In this way, oxygen supply in cells and the brain can be improved.
Deep waves Wave movements in the cushion can stimulate circulation and metabolism in the lower back and legs.
Deep workout Waves movements in the cushion are combined with wave movements from the backrest and can stimulate circulation and metabolism in the lower back, seat surface, and legs.
Hot relaxing back Combination of heat and massage. Starts with back massage. In addition, warm pressure points are noticeable, starting in the pelvis area.
Hot relaxing shoulders Combination of heat and massage. Starts with shoulder massage. In addition, warm pressure points are noticeable, starting in the pelvis area.
  Component descriptions     
  Component description for massage function control unit Model 223 GF91.25-P-5212A
    Model 206 GF91.25-P-5212C
    Model 297 GF91.25-P-5212D
    Model 295 GF91.25-P-5212E
    Model 232 GF91.25-P-5212F
    Model 296 GF91.25-P-5212G
    Model 254 GF91.25-P-5212H
    Model 214 GF91.25-P-5212K
    Model 167 as of model year 2023 GF91.25-P-5212M
    Model 294 GF91.25-P-5212N