every other week or two when i go to start my 99 tl it makes grinding sound almost to the point that you would think the battery is dead took it to the dealer several times they replaced the ignition switch the second visit it stopped for about 2 months then started doing the same thing again have anyone had a problem like that before.I know i didn't give u guys much to on oh, also whenever the car makes the grinding sound the key light thats in the dash doesn't lights up.U think its mechanical problem or electrical problem