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Home >> Mercedes Benz >> 2021 >> E350 Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Towing Systems >> Frame, Trailer Operation - 213 Chassis >> Testing & Repair >> Remove/Install Trailer Recognition Control Unit >> Remove/Install Trailer Recognition Control Unit - AR31.19-P-1300LWT
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Remove/Install Trailer Recognition Control Unit - AR31.19-P-1300LWT

Model 213.2 

with code 550 (Trailer coupling) 

G13745684Courtesy of MERCEDES-BENZ USA
  Risk of injury caused by fingers being jammed or pinched when removing, installing or aligning hoods, doors, trunk lid/rear-end door or sliding roof. No parts of the body or limbs should be within the operating area when the components are moving. AS00.00-Z-0011-01A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
IMPORTANT Notes on sensor system for trunk lid opening/closing Model 213.2
with code 550 (Trailer coupling)
with code P17 (KEYLESS-GO package)
AH80.61-P-0001-01A
REMOVINGINSTALLING Remove/install     
1 Perform initial startup of trailer recognition control unit (N28/1) When replacing the trailer recognition control unit (N28/1).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-04B
2 Switch off ignition and store transmitter key outside of transmission range (min. 2 m)    
3 Remove right side load compartment paneling   AR68.30-P-1185LWE
4 Unscrew nuts (5) and remove trailer recognition control unit (N28/1)    
5 Disconnect electrical connections (1, 2, 3, 4) and remove trailer recognition control unit (N28/1)    
6 Install in the reverse order    
INSPECT Check     
7 Perform function test on ball neck and on light signals at trailer socket