Fan relay for 300E
 

I looked in the parts section to purchase the relays that are behind the fuse box in my 1988 300E. These are the small silver aluminum ones that work with the auxilliary fan. Does anyone know the correct nomenclature for this part so I can order them? The fan keeps running after shutting the off the engine unless I pull the fuse so it leads me to believe these are items that need to be replace. Any help would sure be appreciated.