Trying to define a range to include both rows and columns with

Hi,
I have a number or different types of equipment as vehicles on an excel page. Ie Toyota 1993 spans columns A to E in row 1 and Honda 1995 spans columns F to J and so on. Under each vehicle in row 2 there are 5 sub headings: Date, location, comment, ect. New data is entered into this speadsheet by user input in a form. The form seaches for the vehicle in the A row and once it finds it, it goes to the bottom of the sheet and adds the information. Now I want each vehicle in the sheet to be sorted by the date from newest to oldest. Basically I want to select from A3 to E1048576 and sort this data by date (This would be all the information under Toyota), and then I want the macro to automatically offset itself by 5 columns so that it is now at F3 and to select from here to J1048576 (This would be all the information under the Honda) I recorded a macro to sort just one of these areas but I want it to be a variable cell range. Not quite sure how to do this. I've included my code below:

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