61 13... Removing and installing/replacing relay carrier/fuse box (in engine compartment on bulkhead)

Unlock catch (1) and remove relay carrier/fuse box (2) in direction of arrow from bulkhead (3).

Fig 1: Removing Relay Carrier/Fuse Box From Bulkhead

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Unlock catches (1) and open cover (2) in direction of arrow.

Fig 2: Opening Cover

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Detach DME relay (1) from relay receptacle (3).

Unlock catch (2) and remove relay receptacle (3) with wiring harness (4) in upward direction.

W16: 

Remove DDE relay and associated relay receptacle.

Remove fuses and fuse carrier.

Fig 3: Identifying DME Relay, Relay Receptacle, Catch And Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.