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Remove/install coolant lines - AR20.20-P-7440ELB

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ENGINE 157, 278 in MODEL 212, 218 without CODE 139 (M157/M278 engine cooling measures) 

ENGINE 278 in MODEL 207 without CODE 139 (M157/M278 engine cooling measures) 

Fig 1: Coolant Lines Remove/Install Components
G09975363Courtesy of MERCEDES-BENZ USA
REMOVINGINSTALLING Remove/install     
DANGER Risk of death  caused by vehicle slipping or toppling off of the lifting platform. Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by vehicle manufacturer. AS00.00-Z-0010-01A
DANGER 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
DANGER 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
1 Drain coolant MODEL 207 AR20.00-P-1142FH
NOTES Notes on coolant   AH20.00-N-2080-01A
    MODEL 212, 218 AR20.00-P-1142EL 
2 Remove charge air ducts from air filter to turbocharger   AR09.41-P-8620ELB
3 Remove poly-V belt   AR13.20-P-0001ELB
  Perform operation steps 4 to 8 just during removal of the left coolant lines (1l, 2l)     
4 Detach and remove double clamp (6) from turbocharger and coolant lines on the left (1l, 2l) TORQUE SPECIFICATION Bolt, coolant line bracket to water pump/turbocharger *BA09.40-P-1006-01R 
TORQUE SPECIFICATION Bolt, coolant line clamp to bracket *BA09.40-P-1009-01R 
5 Detach and remove bracket (5) for the upper coolant line (1l) from coolant pump INSTALLATION NOTES
Ensure correct assembly of the bracket (5) and correct routing of the coolant lines on the left (1l, 2l).
Damage will occur on the coolant circuit of the turbocharger otherwise.
 
TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
6 Remove screw/bolts (4) from coolant pump TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
7 Remove screw/bolt (3) for coolant lines on the left (1l, 2l) to turbocharger TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
8 Remove coolant lines on the left (1l, 2l) from coolant pump and turbocharger and take out upwards INSTALLATION IMPORTANT Observe assembly sequence for the coolant lines. The lower coolant line on the left (2l) must always be removed first and then the upper coolant line on the left (1l) on the turbocharger.
INSTALLATION IMPORTANT Replace sealing ring.
 
  Perform operation steps 9 to 14 just during removal of the coolant lines on the right (1r, 2r)     
9 Detach bracket (8) for the upper coolant line on the right (1r) at the coolant pump TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
10 Remove screw/bolt (7) for upper coolant line on the right (1r) at the coolant pump TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
11 Remove screw/bolt (9) for coolant lines on the right (1r, 2r) at turbocharger TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
12 Pull upper coolant line on the right (1r) out of the coolant pump and turbocharger and upwards IMPORTANT Replace sealing ring.  
13 Remove screw/bolt (7) for lower coolant line on the right (2r) to timing case cover TORQUE SPECIFICATION Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover *BA09.40-P-1005-01R 
14 Remove lower coolant line on the right (2r) from timing case cover and turbocharger and take out upwards IMPORTANT Plug openings.
INSTALLATION IMPORTANT Replace sealing ring.
 
SPECIAL TOOL Record plug Figure
15 Install in the reverse order INSTALLATION IMPORTANT Observe assembly sequence for the coolant lines. The lower coolant line on the right (2r) must always  be removed first and then the upper coolant line on the right (1r) on the turbocharger.  
16 Check cooling system for leaktightness MODEL 207 AR20.00-P-1010FH
MODEL 212, 218 AR20.00-P-1010EL 
DANGER Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running. Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. AS00.00-Z-0005-01A
17 Carry out an engine test run, checking the engine for proper operation and leaktightness    
TURBOCHARGER

Number Designation ENGINE 157 ENGINE 278
BA09.40-P-1005-01R Bolt, coolant line to turbocharger/oil filter/coolant pump/timing case cover Nm 9 9
TURBOCHARGER

Number Designation ENGINE 157 ENGINE 278
BA09.40-P-1009-01R Bolt, coolant line clamp to bracket Nm 9 9
TURBOCHARGER

Number Designation ENGINE 157 ENGINE 278
BA09.40-P-1006-01R Bolt, coolant line bracket to water pump/turbocharger Nm 9 9
Fig 2: Identifying Record Plug (129 589 00 91 00)
G09975364Courtesy of MERCEDES-BENZ USA