My 99 E430 has a problem with the "one touch starting" It usually requires 3-4 attempts to get the car started no matter if I try the One touch method or not. Its not the battery since when it does catch it spins fine. When it fails it gives about half a rev and the quits. Has anyone heard of this, and if so is it the ignition switch, the Key itself, or something deeper. I'd appreciate any info at all. I'm a capable mechanic, I owned a toyota supra for 11 years prior and did everything short of blueprinting the engine.

Thanks