No, you should politely decline. Despite what Law Enforcement may tell you, you are not required to take these tests. If you do take these tests, your performance will more than likely be used against you in court. These tests are subjectively and arbitrarily scored by the officer, and most people will fail these tests even when completely sober. Submitting to these tests will more than likely only help the prosecutor to build a stronger DUI or Refusal case against you.
For more information on the Field Sobriety tests please see our DUI Info Center