1996 sl 320 starting problem

[Randy Neefs]

all lights come on when key turned but no power to starter...is this a crankshaft sensor or ignition switch problem..car will start dozens of times then all at once no sart...have to turn key on and off 50 or 60 times to start

[tecqboy]

Ignition switch is notorious for going bad. Do a forum search "ignition switch". Crankshaft sensor does not, to my knowledge, prevent starter from running. Also, possible issue: nuetral switch, negative battery cable, and just plain old bad starter motor. I'd use a volt meter to check for voltage at the starter motor terminal while someone activates the ignition switch.