LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercedes Benz >> 2021 >> A220 Base >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Seats, Bunks, Restraint Systems - 177 Chassis (1 Of 2) >> Testing & Repair >> Remove/Install Restraint Systems Control Unit - AR91.60-P-0624MFB
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Remove/Install Restraint Systems Control Unit - AR91.60-P-0624MFB

Model 118, 177, 243, 247 

Shown on model 247.0 

Fig 1: Restraint Systems Control Unit Components Location - Model 177 (Shown On Model 247.0)
G15492661WARNINGCAUTIONREMOVINGINSTALLINGNOTESTORQUE SPECIFICATIONREFER TO SELF-DIAGNOSTIC SYSTEMSCourtesy of MERCEDES-BENZ USA
WARNING Risk of injury  during testing and repair operations related to pyrotechnical components Do not expose pyrotechnical component parts to temperatures above 100 °C or 212 °F.
Disconnect current supply when working on such component parts.
AS91.00-Z-0008-01A 
CAUTION Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.
AS00.00-Z-0017-01A
Notice  Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
Notice  Notes on self-locking nuts and bolts   AH00.00-P-0001-01KOA
  Notes on safety-relevant components   AH00.00-Z-0019-01A
  Information, assessment and legal requirements when working with, handling and storing pyrotechnical components   AH91.00-Z-0000-10A 
REMOVINGINSTALLING Remove/install     
1 Switch off ignition and store transmitter key outside of transmission range (min. 2 m).    
2 Disconnect ground line from battery.   AR54.10-P-0003MFA
3 Loosen floor covering in driver and front passenger footwell in working area and place to one side.    
4 Unlock powertrain control unit (N127) and place to one side with connected lines. NOTES Do not crush or kink or subject lines to tension This will result in damage to the lines which may impair their functional capability.  
5 Release and disconnect electrical connectors (2).    
6 Remove nuts (1). TORQUE SPECIFICATION Screw/nut, control unit to vehicle floor *BA91.60-P-1004-01Q 
7 Remove Supplemental Restraint System control unit (N2/10).    
8 Install in the reverse order.    
9 Commission Supplemental Restraint System control unit (N2/10). When replacing Supplemental Restraint System control unit (N2/10).  
REFER TO SELF-DIAGNOSTIC SYSTEMS     AD00.00-P-2000-06MFA
AIRBAG

Number Designation Model 118 Model 177
BA91.60-P-1004-01Q Screw/nut, control unit to vehicle floor Nm 10 10
AIRBAG

Number Designation Model 243 Model 247
BA91.60-P-1004-01Q Screw/nut, control unit to vehicle floor Nm 10 10