Car starts then dies on 1990 Mercedes-Benz 560SEC

As soon as I let go of the ignition key, the engine will die. As long as I keep the key cranked the vehicle will run, any suggestions??

by in Campbell, CA on March 09, 2011
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
3 answers
ANSWER by , March 09, 2011
Sounds like the electrical part of your ignition switch is bad. probably a bad terminal or maybe a broken wire, to the ignition position of the switch.
ANSWER by , March 10, 2011
Ignition switch needs to be inspected fixed or replaced.
ANSWER by , March 10, 2011
It wound up being a shorted tachometer.