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Home >> Mercedes Benz >> 2021 >> C300 Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Electrical System - Engine - 205 Chassis >> Testing & Repair >> Disconnect/Connect Engine Wiring Harness To Remove Cylinder Head Cover - AR15.18-P-1000-04MRH

Disconnect/Connect Engine Wiring Harness To Remove Cylinder Head Cover - AR15.18-P-1000-04MRH

Engine 264 

MODIFICATION NOTES

25.04.2021 Cooling system   BF20.00-P-1C01-06D
WARNING Risk of injury  to skin and eyes suffering scalding from contact with hot coolantspray.
Risk of poisoning  from swallowing coolant.		 Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the overpressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.		 AS20.00-Z-0001-01A
  Notes on coolant level Engine 264 in model 253 Engine 264 in model 463 AH20.00-P-1142-01CW
ENGINE WIRING HARNESS

Number Designation Engine 264
BA15.18-P-1001-01K Bolt, engine wiring harness to cylinder head cover M6 Nm 8
ENGINE WIRING HARNESS

Number Designation Engine 264
BA15.18-P-1002-01K Engine cover ball head to engine wiring harness cable duct Nm 8
COOLING SYSTEM

Number Designation Engine 264 in model 167 Engine 264 in model 205 (except 205.080)
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 13, 0 ≈ 8, 6
Low-temperature circuit Liter - -
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 264 in model 205.080 Engine 264 in model 213
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 10, 0 ≈ 11, 0
Low-temperature circuit Liter - -
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 264 in model 222.150 Engine 264 in model 238.377/378/380/38 3/387/477/478/480/4 83/487
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 12, 0 ≈ 9, 0
Low-temperature circuit Liter - -
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 264 in model 238.385/386/485 Engine 264 in model 253 with code B01
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 10, 0 ≈ 13, 0
Low-temperature circuit Liter - ≈ 4, 0
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 264 in model 253 except code B01 Engine 264 in model 257.348
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 13, 0 ≈14, 0
Low-temperature circuit Liter - -
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
COOLING SYSTEM

Number Designation Engine 264 in model 257 (except 257.348) Engine 264 in model 463
BF20.00-P-1001-06D Cooling system Workshop replacement amount Main circuit Liter ≈ 9, 0 ≈ 13, 0
Low-temperature circuit Liter ≈ 4, 0 ≈ 4, 6
Antifreeze/water Down to -37 °C % 50/50 50/50
-38 °C and below % 55/45 55/45
Specifications for Operating Fluids, sheet   BB00.40-P-0310-01A BB00.40-P-0310-01A
Specifications for Operating Fluids, sheet   BB00.40-P-0325-06A BB00.40-P-0325-06A
Specifications for Operating Fluids, sheet   BB00.40-P-0326-06A BB00.40-P-0326-06A
G14185051Courtesy of MERCEDES-BENZ USA
  1. Release and disconnect boost pressure control flap actuator electrical connector (M16/7).
  2. Release and disconnect electrical connection at intake camshaft solenoid (Y49/1).
  3. Release and disconnect electrical connection at exhaust camshaft solenoid (Y49/2).
  4. Unclip electric line from the front cover on the cylinder head, the bracket on the cylinder head cover, and the timing case cover.
  5. Release and disconnect electrical connection at intake camshaft Hall sensor (B6/15).
  6. Release and disconnect electrical connection at exhaust camshaft Hall sensor (B6/16).
  7. Unclip lambda sensor electrical connector upstream of the catalytic converter (G3/2) from the bracket and release and disconnect.
  8. Unclip lambda sensor electrical connector downstream of the catalytic converter (G3/1) from the bracket and release and disconnect.
  9. Unclip electrical wiring harness from rear engine lifting lug.
  10. Remove cable duct from the cylinder head cover, rail, and high-pressure pump shielding with SPECIAL TOOL tool kit TORQUE SPECIFICATION
  11. Release and disconnect electrical connection at intake camshaft valve lift switching actuator (Y49/8).
  12. Release and disconnect electrical connection at fuel pressure and temperature sensor (B4/25).
  13. Release and disconnect electrical connection for cylinder 1 ignition coil (T1/1).
  14. Release and disconnect electrical connection for cylinder 2 ignition coil (T1/2).
  15. Release and disconnect electrical connection for cylinder 3 ignition coil (T1/3).
  16. Release and disconnect electrical connection for cylinder 4 ignition coil (T1/4).
  17. Release and disconnect electrical connection for cylinder 1 fuel injector (Y76/1).
  18. Release and disconnect electrical connection for cylinder 2 fuel injector (Y76/2).
  19. Release and disconnect electrical connection for cylinder 3 fuel injector (Y76/3).
  20. Release and disconnect electrical connection for cylinder 4 fuel injector (Y76/4).
  21. Release and disconnect electrical connector of fuel high-pressure pump.
  22. Release and disconnect electrical connector of knock sensor 1 (A16/1).
  23. Remove vent line from cylinder head cover using SPECIAL TOOL hose clamp pliers and seal openings SPECIAL TOOL with suitable stop plugs.
  24. Place electrical wiring harness to one side.
  25. Connect in reverse order.
  26. Check coolant level and correct if necessary Engine 264 in model 167

    Engine 264 in model 205 (except 205.080)

    Engine 264 in model 205.080

    Engine 264 in model 213

    Engine 264 in model 222.150

    Engine 264 in model 238.383/483

    Engine 264 in model 238.385/386/485

    Engine 264 in model 253 except code B01 (48V technology)

    Engine 264 in model 253

    With code B01 (48V technology)

    Engine 264 in model 257 (except 257.348)

    Engine 264 in model 257.348

    Engine 264 in model 463 FLUID SPECIFICATION

Fig 1: Identifying Hose Clamp Pliers (454 589 00 37 00)
G12939525Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Tool Kit (000 589 10 99 00)
G13657566Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Record Plug (129 589 00 91 00)
G11065549Courtesy of MERCEDES-BENZ USA
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