Note: After the coolant circuit has been depressurized, air must be bled from it. When the engine is warm, the fluid in the cooling system is under pressure. Relieve pressure before carrying out repairs.
- 1 - Fuel line with quick-release fitting
- 2 - Exhaust system
- 3 - Circulation pump -V55-
- 4 - Thermo Top V auxiliary heater with auxiliary heater control unit -J364-
- 5 - Inlet muffler
Note: When replacing the Thermo Top V heater, the tester -VAS 5051B- must first be connected and, in the Guided functions mode, run the function "Heater replacement".
Remove soundproof cover. Remove the front bumper. Remove the right front wheel arch liner.
WARNING: Beware of burns from hot coolant.
Clamp coolant hoses -1- and -2- with clamps up to 25 mm in diameter -3094- -3- and disconnect coolant hoses from heater.
Instructions: Do not disconnect the coolant hoses that are connected to each other.
Disconnect circulation pump -V55- from heater.
Loosen nut -3- (10±1.5 Nm) fastening of an additional heater on the right side member. Remove screw -1- (10±1.5 Nm).
Caution - danger! Fuel leak! The fuel in the power system is under pressure.
Disconnect fuel line quick coupling -2- and close fuel lines with suitable plugs.
Loosen nut -1- (20±3 Nm) fastening of an additional heater on the right side member.
Caution: Additional heater control unit -J364- may be damaged. Too high voltage may appear on the contacts of its connector. Disconnect the 8-pin connector beforehand. First disconnect 8-pin connector -3- from heater.
Disconnect the remaining connectors from the auxiliary heater. Disconnect the remaining connectors from the heater.
Installation
Sufficient space must be provided when working on all moving or hot parts.
Note: If the Thermo Top V heater is not being replaced, the tester -VAS 5051B- must first be connected and the function must be started in the Guided functions mode "Unlocking the heater".
Installation is carried out in the reverse order. After installing the auxiliary heater, the coolant circuit must be bled.
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