Maybe post what chassis this is also? Is this a 300d or 300sd or 300td or ???

I actually JUST barely started having problems with my ignition (on an 85 SD), so I will be paying close attention to replies. Sometimes when I turn the key the engine doesn't stop. I stop it by putting the key back in the ignition, turn it right to "accessory", then left again but slowly this time. I haven't had to use the stop lever yet.