Never mind perlmonks, I finally figured it out.

my $veh_btn = '/html/body/div/div[4]/div[1]/form/div[7]/table[3]/tbody
+/tr/td/table/tbody/tr[2]/td[1]';
@divs = $mech->xpath( $veh_btn );
$mech->click( { dom => $divs[0], synchronize => 0 } );
if ($mech->success())  {
        print "\n  Success, we clicked the detail screen!\n";
    Win32::Sound::Play("ding.wav"); Win32::Sound::Stop();
};
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