In order to keep costs down, the SLC is unlikely to feature gullwing doors. Power is expected to come from an all-new 4-litre V8, while a V6 version based on the SLK's engine is likely to be offered too.
Wagener suggested a coupe version of the all-wheel-drive M-Class is also in the pipeline. The BMW X6 rival would be part of a new breed of Sports Utility Coupes, the first of which is likely to use the new A-Class platform.
The SLC isn't likely to arrive until 2014. In the meantime, there will be two more versions of the SLS, the first of which will be the Black Series in July.
The CLS Shooting Brake will be unveiled later this year, followed by the CLA and a new S-Class in 2013.
The firm's flagship luxury car will be the first model in the line-up to get Mercedes-Benz' new "black box" technology, which will allow the carmaker to monitor each car's health via the internet, allowing detection of potential mechanical problems.