if you have already read some of my threads, I recently put new glow plugs in, the pencil kind. I finally got a call that someone was interested in the 240 so i left it home with my dad and when i got home it would not start any more. he ran the 240 a couple of times during the day but he doesnt really know how to run it properly. when i went to start it in the morning the plugs wouldn't work/warm up, therefore it would not start. i checked the fuse or what i thought to be the fuse for the system, it was blown so i replaced it and it did't work. althought i don't really kow if it was the right fuse. i found the fuse next to the washer fluid and there was two fuses in there and the one was blown so put in a new one. it was a white 8 amp i think if that helps any.
thanks ra

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my name is rachelle and i have aquired a '75 240D. i received the car shortly after my grandfather's passing away. it was one of many of his mercedes. it has been a great car, and has taught me a ton.

never take life too seriously...

If your '75 is like my '77 then the fuse is on the firewall where the glow plug wire connects. It is a flat piece of metal. If it is blown then your light won't light.

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1977 300D Lost coolant while someone else was driving
1983 300D Can't run without oil
1985 300SD (gone but not forgotten)
1990 300TE 4matic Sold
1991 Yamaha Venture
1975 Kawsaki 250 triple
1974 Honda 200CL
1951 8N Ford
2008 Wildfire 650C

75,

Exactly what year and model are you asking about? Do U have series or parallel GP?

A GP fuse would be more like 80 amp, not 8 amp.

If the GP fuse was blown out, you probably have a shorted GP. You will have to find which GP it is and replace it. You can test series GP by connecting a ohmeter across each one and observe which one is different from the others.

P E H

Upgrade kit installed in the last few weeks.

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1983 300D
1984 190D
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Where exactly is this fuse found on the firewall? you keep telling me this but i don't have a clue as to what it looks like and there isn't anything that pops out like someone said earlier that tells me that what i am looking at is really what i need to look at. pictures would really help. i can't follow the glow plug wire because it goes into the wrapped wire system. and it may not be where it is supposed to be because it was rewired after it was given to me to drive before i could drive it anywhere.... the light won't glow but the entire system won't warm up. i can tell because i put my hand on the connecting rod thing between the plugs. normally that would get to hot for me to even touch. i also know that because my boyfriend burnt his fingure on it to see if it was warming up the last time it wouldn't start. the 240 relly wants to turn over though. and another thing that i noticed was that there was no exhaust at all coming out. wierd hugh..

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my name is rachelle and i have aquired a '75 240D. i received the car shortly after my grandfather's passing away. it was one of many of his mercedes. it has been a great car, and has taught me a ton.

never take life too seriously...

How much for the car?
Do you have any pictures???

OK, I don't have a '75 and don't have any pictures of what yours is like. On my '77 the fuse is on the firewall just above and a little towards the passenger side of the oil filter. It is in a block between two wires of which one goes to the Glow Plugs and the other comes from the relay. You have upgraded recently, if I remember your previous post correctly, and I am not sure how the work was done and what besides the glow plugs were changed.

__________________
1977 300D Lost coolant while someone else was driving
1983 300D Can't run without oil
1985 300SD (gone but not forgotten)
1990 300TE 4matic Sold
1991 Yamaha Venture
1975 Kawsaki 250 triple
1974 Honda 200CL
1951 8N Ford
2008 Wildfire 650C

I am asking 4,500 for the 240.
as far as pics i put some on a different thread but i am trying to get them on this thread. on someone else's computer.

try this.

75 240D... amazing

ra

__________________
my name is rachelle and i have aquired a '75 240D. i received the car shortly after my grandfather's passing away. it was one of many of his mercedes. it has been a great car, and has taught me a ton.

never take life too seriously...

when you say firewall it is the wall between the engine and interior right? because the only box thing that i have over there by the oil filter is some fuses for my ac that does not work but is alot of fun to jump. it makes a noise like the ac want to work. found that out when we put the new engine in and couldn't get it to start. diesel dons idea. he thought it was something to the starter. he got the idea from the newer models. i think that 72-75 are different then th76-79or80's. heard that i think from the michanic that worked on my car and got it running for me in the beginning. as far as anything new, i just put the new bosch pencil like lugs in because the faster starting kit doesn't come with everything needed to make it work. a thing companies do to get more money our of you. don't you just hate that, i do. but any help is greatly appreciated

ra

__________________
my name is rachelle and i have aquired a '75 240D. i received the car shortly after my grandfather's passing away. it was one of many of his mercedes. it has been a great car, and has taught me a ton.

never take life too seriously...

75,

If you have the new type parallal GP in your engine, the "W" resistance wires between the GP should not be there any more. The new parallel GP should be all connected together by one copper wire.

P E H

On the w115 there isn't a fuse on the firewall, (I believe) there are two fuses dealing with plugs that are in one of the smaller fuse boxes in the engine bay. (I think it's the box just forward of the main box)

I just upgraded to pencil plugs and it seems that perhaps you left the resistence wires on. Those squiggly metal wires between the plugs should not be used with a parallel system. If you are still using those squiggly resistence wires, make some jumpers out of 10 or 12 gauge copper wire. Also DO NOT connect the ground wire which will cause the fuse(s) to blow instantly.

100th post

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'84 190d 2.2 - Silver
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'76 300D (W115)
Sold, found again in less auspicious circumstances

I agree, it sounds like you must of reused the wires from the series system. This would be the only way you could touch something to see if it is hot. My conversion doesn't warm anything up but the tip of the glow plugs. I used #10 wire between each plug.

__________________
1977 300D Lost coolant while someone else was driving
1983 300D Can't run without oil
1985 300SD (gone but not forgotten)
1990 300TE 4matic Sold
1991 Yamaha Venture
1975 Kawsaki 250 triple
1974 Honda 200CL
1951 8N Ford
2008 Wildfire 650C

75,

On a 115.115 (220D) there is no GP fuse. I would suspect a 115.117 (240D) is the same. I had a GP short in my 220D and it melted the insulation on the wires but didn't blow a fuse.

If you are using the parallel GP, you should also remove the resistance wire in the "salt shaker" hole. You can do this by screwing off the cover, loosening the screws, remove the resistor wire, replace it with #12 copper wire and tighten the screws. This will make the Parallel GP heat much faster. The GP will also stay on while you are cranking the engine with the starter.

And YES, do not connect any ground wires to the parallel GP. They are grounded thru the threads.

P E H

Pictures of your upgrade would really help here.

There is a little problem with the pictures because i am in a different state.
sorry

ra

__________________
my name is rachelle and i have aquired a '75 240D. i received the car shortly after my grandfather's passing away. it was one of many of his mercedes. it has been a great car, and has taught me a ton.

never take life too seriously...