Your case / situation is very complicated and you need to have lawyer who is experienced in DWIs look at your case. You need to hire someone ASAP so they can request an administrative license revocation hearing for you - this will help in the defense of your DWI case.
There are many considerations in your case, and there are only a few facts offered. You definitely should hire someone who is PROFICIENT defending DWIs; it is especially important to hire someone proficient because few lawyers you will encounter will understand even the year your car was made could have an impact on your case. The last question you asked might turn on when your car was manufactured.
If you need a referral, I will be happy to point you in the right direction. A good starting point is the National College of DUI Defense (www.ncdd.com). Good luck.
You might want to take a look at the NHTSA training manual that is a training manual for police officers regarding sobriety tests. It requires that medical conditions be considered in evaluating sobriety tests.
There are also toxicologists and other experts who can be consulted in this regard.
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