I have a 1950 170d and it does not have any controller at all. Theres a lever on the dash by a small cup with a hole in it. Turn the lever down "half way" and hold till you see the coil in the 'hole-in-the-cup' glow red, (it appeares to be just the coil from a glow plug), then, turn the lever down all the way to start the engine. Turning the lever 'up' shuts off the engine.



Thats the 6.2 Blazer behind, , ,

Didnt mess with the MB, however, the controllers for the 6.2 system cost about $115.00 each 10 years ago, & the blazer was eating 'em for breakfast, & I couldnt figure out what the problem was.

All about $$

I drew a sketch of the Manual System on the Volvo except that I do not have a Fuse in the system See Post 18.

Manual Glow Plug "timer" switch

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84 300D, 82 Volvo 244Gl Diesel

I'm thinking about a multi relay controller I wanna build... The plate on drivers fender is perfect for it... Feed each relay with a 20a. Fuse... Simple, and individual gps controlled individually , for redundancy...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Ford solenoid is a Wells part number F492 available from any local parts store.

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1981 300 SD 213k miles "Stock for now"
1999 Super Duty 7.3L 113k miles
1981 300 SD 180k miles "Heavily modified" SOLD

http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/359811-sale-manual-mercedes-glow-plug-controller-w123-300d-240d.html#post3385882

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

funola,
When you say make sure the coil is grounded, is it grounded normally or is that something I"ll have to do myself? If so how. Not good with E-gremlins.

PR

Hi Guys, I'm a little confused (and late to the party). The stock W123 Glow system does have a 'manual' mode. When things are cold out, I simply turn the key to "On" and then just wait for as long as I want, up to 30 second timeout. I don't understand what problem is being solved here.

Check out how the W123 glow plug relay works... https://www.youtube.com/watch?v=6BAgO0ZR54U

Sincerely,

Packman

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83 240D - 4 speed manual - Manilla Beige
189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too!

If you don't have a problem, I guess there's nothing to solve....nothing to see here anyway.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

Some are and some are not. You'll have to check. If you're not good w e-gremlins. I have one already converted for $40 + shiping. Comes with a 1 year warranty.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked