I have a red '07 CLK63 Cab. I've owned it since 2013. It only has 39,000 miles. Luckily I've had no major problems. Notice though how low your front spoiler is. I've repaired mine twice. You need to sneak up on curbs. Brakes & calipers are expensive & complicated. The Brembos have like 8 fine tune adjusters to set each caliper correctly. My top has had issues, no concern to you. Obviously, everything on the car can be expensive & there are a lot of little niggly things I've ignored. Seat A/C blower doesn't work, one of the fine tuning seat adjustments gave up & I'm developing a short in the antenna so the radio kicks out sometimes. But the 6 disk CD works fine. I will never sell it. It is the finest road car I've ever owned. Loves to cruise at 80 mph, about 2,800 rpm. It's a 7 speed auto. My try for a once in a lifetime top speed was just over 150. This link has helpful info.
https://mbworld.org/forums/clk55-amg-clk63-amg-w208-w209-45/