It does seem strange, every other C55 that I've seen photos of does have a bespoke 180mph cluster. I'm unsure why this one doesn't, unless it has been replaced at some point due to dodgy pixels?
Never seen a UK market C55 with the beefier 180MPH cluster, I have only seen the 160MPH aka 260KM/H on all C43's and some C55's.
Euro and Japanese C43's have the 280KM/H cluster which I also have on my car.
Many years ago I managed to find several
brand new genuine VDO 300KM/H ivory dials with the AMG logo for C43 and C55.
I also have one pre-facelift cluster for 1998 to 1999 W210 E55AMG VDO ivory dial rated 300KM/H with the AMG logo.
I have the stuff at home.
Germans loved to mod their C43 clusters with these 300 dials, in Germany company MKB calibrated clusters after dial replacement.
My Mercedes specialist can swap the dials but has no calibration instruments for accurate KM/H readings.
Need to find a shop who can calibrate the 300 KM/H dial to cope with my 3,07 diff.
Few years ago I watched an US episode of Wheelers dealers when Mike went to a shop calibrating clusters.
Can't remember what car or season or episode it was?