Hi mods. Some of the members have tested this (link below) and found a solution to the dreaded C63 cooling and "limp-mode" problems via a radiator blockoff panel. All the specs are included in the post for a DIY, with template measurements etc. Would be really helpful for this to be a sticky, as it's a MAJOR problem with these models and will save forum members a lot of headache, time, and money.

Post #45 is where the meat of the info starts

Many thanks!

https://mbworld.org/forums/c63-amg-w...your-cool.html