So I just bought a 1977 240D, originally a 300D but had a rebuilt 240 motor put in it. The motor has less than 30k, new clutch 3k ago, runs drives and shifts GREAT! However this thing is quite a basket case for a guy who doesn't know much about how to work on cars let alone an old mercedes that's hard to get information/parts/help on. Thing is I love this car and though I could easily trade it to someone for a working running car I want to fix it up and make it my daily driver as the motor will last me a long time!
These are the main things I need to do on it to get it to be able to be drive daily. And I will post pictures soon too. Also, these problems are written in order of importance. Antyhing you have to contribute will help me greatly!
-Glow plug relay
: The mechanic i bought if from put a newer 80s model relay in it, I have to figure out how to wire it in, I'm guessing take all the wires through the firewall and manually wire it into the old glow plug wire housing somewhere under the dash by the drivetrain is what I've read? However the wiring on it is quite confusing to me, it's spliced into a plug on one part and what not. If you know how to locate this and what I need to do to wire it that would be great. The new pencil-shaped upgrade is already in place and wired into the relay thank GOD, just have to give power to and wire under dash the relay now.
: Currently not connect, though he SAYS the core is good and will work once I find out how to connect it back together. I believe him because everything he's told me about this car has turned out to be true. I just have no idea how to do this. It's all spaghetti wires through the firewall right now and totally cattiwompus.
: Key doesn't turn it off. Have to put it into 4th gear and kill engine to shut off. Which SUCKS. I looked on dieselgiant and they want $198.00 for a new fuel shut off valve. So I really hope I can either figure out where mine is under the hood and make it work, or find one in pick n pull (already been there half a dozen times pulling parts off other mercedes for this car!!!)
-Random wiring stuff
, for example the turn signals don't work right now, can't figure that out, there are random wires that aren't hooked up to anything under the hood like cruise control, a wire that goes from underneath the speed guage out to the motor that looks like a manual choke adjustment
Random other things like only two windows will roll down (power windows), don't know whether it's bad wiring or need new regulator motors, hood won't latch correctly even after getting a different latch from a 78 240 etc., etc.
I bought this car because I wanted to convert it to WVO and also just because I want to teach myself to work on cars and understand mechanics better so I know how to work on cars better when problems come up. However I am at the verge of giving up, I have a guy who wants to trade me straight up for a 87 Subaru GL wagon and it's tempting but I want to stick with this thing and see if I can figure it out.
This is the new relay, just plugged that big red cord to the battery and then to the starter solenoid, not sure where to go from there...
There's just spaghetti wires everywhere; vaccum lines, electrical, etc
1977 Mercedes 240D 191000 miles