I'm sure I know what the majority of opinions will be, but here goes anyay!! Halfords are currently selling 5ltrs of Comma ATF fluid for £15 which means I can change the fluid in my car for £30 (plus filter and gasket). The fluid is DEXRON 11/11D/11E/111 spec so should be up to the job. Has anyone used it, or would you all be prepared to pay approximately 70% more for the best prices I have seen for similar (but better branded) fluid? I have no Idea when the fluid was last changed and I have the filter / gasket ready to go so any advice asap would be appreciated. By the way it is for a 168k mile W124 E320.