Not me that spotted this. It was my bro, last week along the M56 Chester bound he came across this black 4200. He was in a SLK AMG if the person is on here as I think they might be because weirdly enough after he posted me the pictures, I realised that it was parked behind me at Oulton Park a few months back in the Maserati section!!
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Is your brother in the passenger seat of that LH drive Mercedes?