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Home >> Mercedes Benz >> 2021 >> GT 43 AMG >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Exterior Trim >> Seats, Bunks, Restraint Systems (2 Of 3) -- 290 Chassis >> Testing & Repair >> Remove/Install Pneumatic Pump For Multicontour Seat - AR91.25-P-1431FR

Remove/Install Pneumatic Pump For Multicontour Seat - AR91.25-P-1431FR

Model 257, 290 

with code 432 (Dynamic seats left and right) 

Model 290 

with code 409 (Left and right front multicontour seat) 

Shown on model 257 with code 432 (Left and right dynamic multicontour seat) 

G16556470Courtesy of MERCEDES-BENZ USA
Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Switch off ignition and store transmitter key outside of transmission range (min. 2 m).    
2 Remove spare wheel well trim. Model 290
with code 409 (Left and right front multicontour seat)
Model 290
with code 432 (Dynamic seats left and right)
AR68.30-P-4620FRX
    Model 257
with code 432 (Dynamic seats left and right)
AR68.30-P-4620FR
3 Remove screw (1) at compressed-air reservoir (5).    
4 Disconnect pneumatic lines (3, 4) at compressed-air reservoir (5). SPECIAL TOOL Pliers Fig 1
5 Take pneumatic lines (3, 4) out of foam mount in cap (2).    
6 Unclip cap (2).    
7 Take multicontour seat pneumatic pump (M40) out of foam material (6) and place to one side. NOTES
Ensure that pneumatic lines (3, 4) and further pneumatic lines at terminal block on multicontour seat pneumatic pump (M40) do not kink. Leaks may occur otherwise.
 
8 Unclip pneumatic terminal block from multicontour seat pneumatic pump (M40) using a suitable tool.    
9 Disconnect electrical plug from multicontour seat pneumatic pump (M40).    
10 Remove multicontour seat pneumatic pump (M40).    
11 Install in the reverse order    
Fig 1: Identifying Pliers (000 589 04 37 00)
G16556471Courtesy of MERCEDES-BENZ USA