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Home >> Smart >> 2016 >> Fortwo Passion, Standard Trans >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Brakes - Hydraulic & Mechanical Systems - 451 Chassis >> Testing & Repair >> Remove/install brake line from the master brake cylinder to the ESP hydraulic unit >> Remove/install brake line from the master brake cylinder to the ESP hydraulic unit - AR42.10-P-0034MCU

Remove/install brake line from the master brake cylinder to the ESP hydraulic unit - AR42.10-P-0034MCU

MODEL 451.3/4 

Fig 1: Identifying Master Brake Cylinder Brake Line To ESP Hydraulic Unit Remove/Install Components
G10978424Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of poisoning  caused by swallowing brake fluid. Risk of injury  caused by brake fluid coming into contact with skin and eyes. Only pour brake fluid into suitable and appropriately marked containers. Wear protective clothing and eye protection when handling brake fluid. AS42.50-Z-0001-01A
NOTES Brake fluid notes   AH42.50-P-0001-01A
NOTES Notes on repairs to brake system   AH42.00-P-0003-01A
1 Remove brake lines from hydraulic unit (5) to rear axle IMPORTANT Remove brake lines from hydraulic unit (5) to rear axle only as far as it takes for the bracket to be unscrewed. AR42.10-P-0035MCU 
2 Loosen nuts (2), remove bolts (3) and remove bracket (4) INSTALLATION IMPORTANT : Move guide pin (6) on the hydraulic unit (5) into the bracket (4).
TORQUE SPECIFICATION
*BA42.45-P-1008-01F 
3 Support hydraulic unit (5) using transmission jack and removal fixture and lower carefully until the brake lines (1) are accessible SPECIAL TOOL Removal fixture
Transmission jack
Figure
4 Unclip retaining clip (7) of the electrical line (8) Not on model 451.390/490  
5 Check bolted connections of brake lines (1) with the hydraulic unit (5) and the master brake cylinder (9) for color coding INSTALLATION IMPORTANT : Mark brake lines (1) accordingly. AR42.10-P-0013-05MCC
6 Loosen bolted connections of brake lines (1) with the hydraulic unit (5) and the master brake cylinder (9) and separate IMPORTANT Collect brake fluid in a suitable container. Seal connections using suitable plugs.
INSTALLATION IMPORTANT : Use a 12 mm open-end wrench bit. Do not bend brake lines (1), pay ATTENTION to routing, leaktightness and clearance.
TORQUE SPECIFICATION
*BA42.10-P-1005-04E 
    TORQUE SPECIFICATION *BA42.10-P-1010-04E 
7 Remove brake lines (1)    
8 Install new brake lines (1) Only if the brake lines (1) with the red color coding have been detached.  
9 Install in the reverse order    
10 Bleed brake system   AR42.10-P-0010MCU 
BRAKE LINES, BRAKE HOSES

Number Designation Model 451.3/4
BA42.10-P-1005-04E Brake pipe to master brake cylinder Nm 16
BA42.10-P-1010-04E Brake line to ESP hydraulic unit Nm 16
ELECTRONIC STABILITY PROGRAM (ESP)

Number Designation Model 451.3/4
BA42.45-P-1008-01F Bolt, ESP hydraulic unit bracket to floor panel Nm 25
Fig 2: Identifying Removal Assembly (450 589 02 62 00)
G10977991Courtesy of MERCEDES-BENZ USA