Where is the starter interupt switch?
 

I'm starting to have trouble starting my car when its in park. When I move the gearshift down to neurtral it then starts fine, so I know I either have a problem with bad shift linkage bushings or a bad switch. Does anyone know where the switch is? Is it outside on the transmission or inside under the center console?

Thanks.

GregS
'84 300D, 183k
'90 300CE, 173k

It's on the side of the transmission right where the shaft that meets the shift rod goes into the transmission. If there's any fore-aft play in the shift lever, you have worn shift rod bushings.

Sixto
95 S420
87 300SDL