you can always use split on different levels...first split the var up with the @ and then with the /
e.g.
f:= Car1|Garage1|test1|2.00/test2|0.05@123456;
var f1:= split(f,'@')[1];
var f11:= split(f1, '/')[1];
if ubound(split(f1, '/')) >= 2
then var f12:= split(f1, '/')[2];