w140 ignition switch R + R.

[oldsinner111]

I you have a S Class w140,some E class of same period. Your switch might give you signs of wearing,starts fine,only to come back and won't start.Or holding key at starting posistion longer than a minute,then starts.
When ignition acts up turn key to run,reach down to starter with a tool,and provide connection to both teminals on the soleniod.If engine starts its your switch.
Removal of just switch,tools needed two small allen wrenches,philps screwdriver, and 10mm wrench. Remoe panel under steering wheel,lower steering wheel to the bottom.US vehicles on the right top of panel,grab and pull down.Close to E Brake area you will see a screw,remove.Panel will come down.On the floor you will see a bracket hold the bottom with screw remove,unplug connection on panel.Maybe a screw at top right panel.
Now lay on your back under switch,switch is inside of metal cylinder to remove plug press square button on top cylinder and remove plug.Next undo metal cap at rear containing streering lock,making sure key is at posistion one.Next cylinder has two buttons on each side depress with allens,as you pull cylinder back.Pull out switch,and discard ,insert new one.reverse every thing you did,making sure key is in posistion one.put the nut back on the steering lock with 10 mm wrench.
Now no more towing bills.
One Note of advice once steering lock is out you may turn key to line up new switch. Two I removed instruments for more light,Three do diconnect battery.
I hope this helps someone Tennessee Nate