As the title says. I just picked up this 1983 240d. It was in a flood (maybe up to the bottom/top of the seat, not sure honestly) about 3 years ago. Other than that I believe it has been sitting for the past 14 years, and was running perfectly when parked. 176k miles. Extensive service records. I believe it was well taken care of, but who knows I may be wrong. Here is what I've done in an attempt to start it.

-Flush engine/new oil+filter (no water)
-New fuel filters
-Running fuel supply into a separate tank w/ clean new diesel and some injector cleaner
-New coolant
-New battery
-Cleaned air filter housing
-Trans fluid is clean
-Checked fuses




Here's what happened. Upon first turning the key, the glow plug light was working. When it went off, I turned the key and the engine was turning over smoothly. Cycled the key a little to just let the plugs warm up. Tried again, car sounded like it fired once or twice, then nothing. Soon after, the glow plug light went out, and I noticed the glow plug relay was so hot it couldn't be touched. Now I can't get the light to come on. Fuse didn't blow. I removed / disassembled the relay, and found it was rusty and had moisture in it. Tested, im getting power at the relay, but the plugs get no power anymore. Maybe it's bad?

I pulled all 4 glow plugs, when tested, they get red hot on the tip within 6-8 seconds. Cleaned them, installed, and hooked up leads to the end of each, running them to the battery in order to bypass the relay for now.

They are getting hot, but the engine still won't even fire.

It's like 20 or so degrees Fahrenheit here.

Should I spray WD-40 in the intake?

Thanks in advance. Trying to decide if I want the car as a parts car for my w123 300d, or keep and drive it. It's light ivory/palomino, very clean interior. Wish it was a 300d :/