Can I Disable the Starter Lockout Function - PeachParts Mercedes-Benz Forum

mach4 · #1 03-13-2014, 12:15 AM

Quote:

Originally Posted by tangofox007

Do you plan to leave the key in the switch on a permanent basis?

Or does your engine just require frequent and repeated use of the starter?

No I don't plan on leaving the key in all the time. I've got a supplemental set of gauges that run using a bluetooth connection between a microcontroller mounted in the engine compartment and an old Android phone. The connection can be finicky when reconnecting, so every time I shut the engine down the gauges may not reconnect reliably. Once it's connected it's bulletproof. I'd like to be able to leave the ignition on during short stops to keep the gauges active. Don't want to leave the microcontroller on all the time and risk running the battery down.

Engine Instrumentation Project

whunter · #2 03-13-2014, 03:59 AM

Quote:

Originally Posted by mach4

No I don't plan on leaving the key in all the time. I've got a supplemental set of gauges that run using a bluetooth connection between a microcontroller mounted in the engine compartment and an old Android phone. The connection can be finicky when reconnecting, so every time I shut the engine down the gauges may not reconnect reliably. Once it's connected it's bulletproof. I'd like to be able to leave the ignition on during short stops to keep the gauges active. Don't want to leave the microcontroller on all the time and risk running the battery down.

Engine Instrumentation Project

Why not install a 2-3 valve like I did in the shutoff vacuum line of my daughters 300D.
Welcome to the fleet 1976 W115.114 "300D" dark Green
The engine will never shut off, unless you close the valve, regardless of key position.

Welcome to the fleet 1976 W115.114 "300D" dark Green

Manual Vacuum shutdown switch

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mach4 · #3 03-13-2014, 10:01 AM

Quote:

Originally Posted by whunter

Why not install a 2-3 valve like I did in the shutoff vacuum line of my daughters 300D.

Already have a manual shutoff. I used a vacuum solenoid in the engine bay with a switch in the cabin. I want to restart without cycling the key if possible.

whunter · #4 03-13-2014, 12:05 PM

Quote:

Originally Posted by mach4

Already have a manual shutoff. I used a vacuum solenoid in the engine bay with a switch in the cabin. I want to restart without cycling the key if possible.

I am totally confused.

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mach4 · #5 03-13-2014, 12:27 PM

Quote:

Originally Posted by whunter

I am totally confused.

I don't think I've done a good job at explaining what I'm looking to do. At the risk of muddying the waters further, let me take another crack.

The stock functionality of the ignition key switch is to allow only start attempt per key cycle. The purpose is to prevent inadvertently engaging the starter with the engine running. Inserting the key and moving it to the RUN position and then on to the START position engages a mechanical lock-out that prevents another attempt to engage the starter without first going all the way back to the OFF position. All I want to do is mod the switch to be able to eliminate the lockout function so as to be able to go from RUN to START many times without returning to OFF.

I know I can add a manual start button to accomplish this, but my goal, and the point of the question was to see if a mod could be accomplished to eliminate the lockout feature of the switch.