Open glove box at left-hand side.
Pull relay off multiple plug.

31480001 - click to zoom
 
Possibilities of checking relay:
Pull relay off multiple plug.
Connect tag 85 to + and tag 86 earth (or, alternatively,
86 to + and 85 to earth).
If a clicking noise is to be heard during this check, the
relay is in good order.

31480002 - click to zoom
 
Pull relay off multiple plug and apply 12 V current to plugs
85 and 86.
In so doing, the relay must exercise a pulling force, which
is audible due to a clicking noise.

31480003 - click to zoom