hmmm, no fuse huh? whatever happened to good old MB over-engineering? i was just speaking in general terms as i had just assisted someone with debugging a non-working compressor circuit in a toyota. it's not in the manuals but through a diligent search of usenet, i found that there was a fuse and a circuit breaker in the relay circuit. sure enough the fuse was blown and the breaker tripped...
1993 300e-2.8 - gone now <sigh>
"Do not adjust your mind, it's reality that's malfunctioning"