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74 240D Glow plug pull switch inop
The glow plugs on my 1974 240D won't turn on unless the pull switch is pulled all the way out and the starter is running. I've been putting it in Drive to keep the starter from running until it's warm, then into Neutral to engage the starter. I don't think the glow plug light is working either. Is the switch itself at fault? Relay? How difficult and expensive is this to fix? Thanks, Neil
Thanks for following up!
Hi there Kaia, I just got a chance to check my email for the first time in days, sorry for the delay in getting back to you! Yes, I did receive the new potentiometer - thanks so much for your assistance with this, I do very much appreciate it. And thanks also for following up! I'll be sure to speak positively of your company to the several friends of mine here in the SF Bay Area who are also classic Benz owners. Just for fu... Read More
I recommend a fast glow plug upgrade
Just my humble opinion, but unless you are in love with the original pull starter, I would suggest you upgrade your system to fast pencil style plugs wiring in parallel with a dash button activated solenoid. I have put together a kit to help you make this upgrade.
CLICK HERE to read more. You will spend just about as much money replacing your old pull switch and in the end you will still have to deal with those old inefficient series style glow plugs
Glow plugs systems as well as upgrade options are discussed in detail in my
Advanced Pre-Glow Systems Manual