Is vacuuming under W126 fusebox enough?

[86560SEL]

We charged the A/C on my mothers 88 W126 today and it had been running with the A/C (fan) on high for about 20 minutes. We turned it off and I kept getting whiffs of what smelled like "hot wood" and I traced it down to the fuse box area... not in it, but around it. It dont smell electrical, it smells like someone has used a wood burning kit. I looked and natually there are alot of leaves in there and I am assuming I was smelling those heat up? I was told once that the A/C / (fan) relays were under there and get very hot. We have not used the fan in a long time (since winter when the heat was used).

I am wondering if vacuuming it alone is sufficient or should the fuse box be removed somehow to get them all? Seems like a lousy design on MBs part.

Thanks