When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
What turbos did you upgrade to? 100 kph to 200 kph is about 62 mph to 124 mph. Have you timed a 60-130 mph run so we can see that, as I would guess that would be a low 6.0 - 6.2 second time based on the kph run, but don't know for sure. I am bone stock (and a non-S C63) and my 60 - 130 time is a terrible 11.84. The car really seems to fall on its face above 5k rpm or so, but I managed to run an 11.87 ET @ 117 mph in the 1/4 mile so the car seems to be running just fine.
It is also typically really hot (although not quite desert hot like you) and humid where I live, so I feel your pain with the heat.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
