| Removing and installing onboard supply control unit -J519- |

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| The relay carrier on the onboard supply control unit is clipped under the onboard supply control unit and can be removed. |
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| If the onboard supply control unit -J519- is to be renewed, the procedure „coding onboard supply control unit“ → Chapter must always be carried out for reading the codes stored in the control unit. |
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| The following illustrations show removal on a LHD model. Removal and installation of onboard supply control unit on an RHD model are performed using the corresponding mirror-image procedure. |
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| Switch off ignition and all electrical consumers and remove ignition key. |
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| Remove relay carrier from onboard supply control unit → Chapter. |
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