Removal and installation the fuse box
The fuse box is located under the dashboard, in the driver's side footwell. Switch off the ignition and all electrical consumers, remove the ignition key. Remove the trim in the driver's footwell. Unscrew the mounting screws "arrows" and pull the fuse box "1" down from the holder.
Installation in reverse order. First connect the fuse box on the right side of the holder. Then turn the fuse box on the left side until it stops upwards and screw it in place with two mounting bolts. Tightening torque of the mounting bolts: 2.5 Nm.
Relay blocks
The relay boxes are located under the storage compartment in the driver's side footwell.
Removal and installation the relay block on the front panel
Disconnect the battery. Remove the trim on the left side of the driver.
Only cars with parking assistant
Remove the parking aid control unit -J791-.
All
Unlock the "arrow A" latches and gently pull the "1" relay unit downwards from the holder. Tilt the "1" relay unit under the "arrow B" clamp. Unlock the connectors on the back of the "1" relay unit. Remove the "1" relay unit from the vehicle.
Installation is carried out in reverse order.
Removal and installation the relay block on the on-board network control unit
The relay block on the on-board network control unit, front panel on the left "arrow" is located under the front panel on the left.
Instructions: The on-board power supply control unit "J519" and the relay unit on the on-board power supply control unit, front panel on the left form a single unit and cannot be separated. When replacing the on-board power supply control unit "J519" or the relay unit, it is necessary to carry out the work "Coding the on-board power supply control unit "J519" to read the codes stored in the control unit.
Switch off the ignition and all electrical consumers, remove the ignition key. Remove the fuse panel. Move the safety lock "1" of the relay block connectors on the on-board power supply control unit "J519" in the -direction of the arrow-.
Instructions: The connectors of the relay unit on the on-board power supply control unit "J519" can only be removed if the safety lock has been previously set to the "AUF" position. The number of connectors and relays depends on the vehicle equipment. All connectors can only be installed in one position, therefore, it is not necessary to mark the connectors.
Unlock and disconnect plug "2". Move safety lock "1" of the on-board power supply control unit plugs in the -direction of the arrow- position to the "OPEN" position. Unlock and disconnect plug "2".
Unlock the relay block on the on-board network control unit "J519" "2", unclipping the locking tabs "1" in the direction of "arrow A" from the holder. Remove the relay unit on the on-board network control unit "J519" "2" in the direction of "arrow B" from the holder.
Installation is carried out in reverse order.
Instructions: The safety lock can only be set to the "CLOSED" position if all plugs are "correctly" installed. After replacing the on-board power supply control unit "J519", it must be coded.
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