deeperblue

My 2012 GL450's secondary air pump is broken again. Last time it was repaired by a garage but this time I want to DIY. I have got most things figured out I think but I need to find where the relay is. I have attached a picture of the fuse box in the front engine bay. Is #4 the relay for secondary air pump?

Thank you very much!

chassis

Yes, #4 is the one.

Per function diagram PE07.61-P-2101MAC you are looking for component F58kE, air pump relay.

Per WIS GF54.15-P-1257-02GZ
The fuse box is F58, fuse and relay box in right engine compartment.

Your relay 4 is M-B relay E, secondary air injection pump

deeperblue

Thank you very much!