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Home >> Mercedes Benz >> 2021 >> E53 AMG 2D Convertible >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Seats, Bunks, Restraint Systems - 238 Chassis (2 Of 4) >> Testing & Repair >> Remove/Install Front Passenger Seat Heater Control Unit - AR91.30-P-0035LWO

Remove/Install Front Passenger Seat Heater Control Unit - AR91.30-P-0035LWO

Model 213, 238 

With Code 902 (Seat heater Plus for driver and front passenger) 

Model 205.### 1# up to 5/31/15, 253.### 1# up to 5/31/15 

With Code 401 (Climatised front seats) 

except code 222 (Electrically adjustable right driver seat) 

except code 242 (Front passenger seat, electrically adjustable with memory function) 

Model 205.### 1# up to 5/31/15, 253.### 1# up to 5/31/15 

With Code 873 (Left and right driver's seat heating) 

except code 222 (Electrically adjustable right driver seat) 

except code 242 (Front passenger seat, electrically adjustable with memory function) 

Model 205.### 2# up to 5/31/15, 253.### 2# up to 5/31/15 

With Code 401 (Climatised front seats) 

except code 221 (Electrically adjustable left driver seat) 

except code 241 (Memory switch for electrically adjustable front passenger seat, left) 

Model 205.### 2# up to 5/31/15, 253.### 2# up to 5/31/15 

With Code 873 (Left and right driver's seat heating) 

except code 221 (Electrically adjustable left driver seat) 

except code 241 (Memory switch for electrically adjustable front passenger seat, left) 

Fig 1: Front Passenger Seat Heater Control Unit Components Location - Model 238 With Code 902
G15379409Courtesy of MERCEDES-BENZ USA

Shown on model 238 

Topical note  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Commission driver's seat control unit for seat heating (1). When replacing the driver's seat heater control unit (1).  
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 238 with code 902 (Seat heater Plus for driver and front passenger) AD00.00-P-2000-06LWO
REFER TO SELF-DIAGNOSTIC SYSTEMS   Model 205.### 1# up to 5/31/15, 253.### 1# up to 5/31/15 with code 401 (Climatised front seats) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.### 1# up to 5/31/15, 253.### 1# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.### 2# up to 5/31/15, 253.### 2# up to 5/31/15 with code 401 (Climatised front seats) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
Model 205.### 2# up to 5/31/15, 253.### 2# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
Model 213 with code 902 (Seat heater Plus for driver and front passenger)
AD00.00-P-2000-04B
2 Switch off ignition and store transmitter key outside of transmission range (min. 2 m).    
3 Remove bolts from guide rails of front passenger seat. Model 205.0##/1##/2##/3## 1# up to 5/31/15, 253.### 1# up to 5/31/15 with code 401 (Climatised front seats) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.0##/1##/2##/3## 1# up to 5/31/15, 253.### 1# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.0##/2##/3## 2# up to 5/31/15, 253.### 2# up to 5/31/15 with code 401 (Climatised front seats) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
Model 205.0##/2##/3## 2# up to 5/31/15, 253.### 2# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
Model 213, 238 with code 902 (Seat heater Plus for driver and front passenger)
AR91.10-P-1000LW 
    Model 205.4## 1# up to 5/31/15 with code 401 (Climatised front seats) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.4## 1# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 222 (Electrically adjustable right driver seat) except code 242 (Front passenger seat, electrically adjustable with memory function)
Model 205.4## 2# up to 5/31/15 with code 401 (Climatised front seats) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
Model 205.4## 2# up to 5/31/15 with code 873 (Left and right driver's seat heating) except code 221 (Electrically adjustable left driver seat) except code 241 (Memory switch for electrically adjustable front passenger seat, left)
IMPORTANT The front passenger seat remains in vehicle.
AR91.10-P-1000LWR
4 Tilt back front passenger seat and unclip front passenger seat control unit for seat heating (1).    
5 Disconnect electrical connectors (2, 3) and remove front passenger seat control unit for seat heating (1).    
6 Install in the reverse order.