the CLK-GTR lightly resembles the CLK, and i think it may have also competed in either the FIA GT series or the LeMans series. The CLR is just the next generation of the racer, nothing to do with the CL. Not much is known about the CLR, apart from the fact it was a complete embarassment. The CLK-GTR road version was sold at $1,000,000, all of the 25 made losing money. They were sold because the regulations stated 25 production models had to be made and sold at $1,000,000 or less in order for them to be allowed to enter their race cars. The road going cars use the older 6.7 V12 used in 1997, putting out 612 hp in road trim. From 1998, a lighter weight V8 replaced the V12 in the race cars, but no road cars were ever made with this engine
1997 CLK-GTR with 6.7 V12
1999 CLR with 6.0 (i think) V8
