If all the recall work has been carried out then it should be ok - they early W211s were very problematic and so were the others but late 2005 build cars were better. However, you will need support from a MB garage for parts/servicing/repairs or at least a garage with access to STAR and knowledge on MBs of this generation.
What part of Africa? If a remote part without MB support then you would be better of finding a good W124 instead.