You apparently have never worked with rat abatement. There is a thin wooden vertical tongue & groove shell surrounding the whole thing, underneath that is mountains of chewed up insulating foam. I will remove the wood, it's in rough shape in a few spots, renew the seals, jets and pipes, encase all that in a sufficiently thick amount of foam to insulate and firm everything up. The hardware cloth will go around that with great care taken at the top and bottom joints - fiberglass above and concrete pavers below, to make it so the little bastards will skewer their tiny throats on the wire tips if they try to squeeze through. The wooden siding would be ideal for them to keep their cute little incisors honed on, no way in hell am I gonna trust that to keep rats out.

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1986 300SDL, 362K
1984 300D, 138K