Does this mowing head fit for a Stihl FE55 type 4803? Serial number 238694273, A. Stihl 98 48039671801 Esal

It looks like your machine only has the Autocut 11-2 4004 710 2105 Which has been replaced by the 4004 710 2192 https://www.lsengineers.co.uk/autocut-11-2-stihl-strimmer-head.html