Thanks Dave. It was a more metallic smell than burning rubber, but I think it's all semantics really. I don't know much about A/C compressors to be honest - so I'll take your guidance on it being the clutch on the compressor. That means new compressor presumably or can just the clutch be replaced? Biggest concern right now though is whether I should be covering any great distance in the car whilst the compressor is at death's door. Thoughts?