TL;DR near the bottom.
New member here, Id like to start by thanking everyone who post on the forums. I've read alot of helpful information you have my thanks.
Now onto my problem. About a year and a half ago I managed to get my hands on a 97' E420 (w210) with 130k miles at an auction for $1100. It started right up and was driven home. During the time ive had it I taught myself to do automotive body work and painting in order to to repair / repaint some problem areas. A year later Ive repainted the whole front bumper, rear bumper, hood, as well as some other areas with defects (scratches, dents, rust, etc). Ive since completed the paint work and am going through the steps to get it back on the road.
Unfortunately I have been unable to start it for about a week or so
. This kills me inside, I really love this car (that ive never driven on the road) and would love nothing more then to give it new life. Im pretty sure the issue is with the DAS/Immobilizer system as I have the (dreaded, feared, satanic) red and green alternating lights in the rear view mirror.
Again they alternate (tik, tok, tik, tok, red, green, red, green) And it does seem to only last 30 seconds but just comes back when I try to start the car. The engine cranks but will not start, like the engine is not getting fuel or spark. This is probably the 3rd or 4th time ive had the issue where the engine refuses to start since ive had the vehicle but usually the issue just went away on its own after like 30 minutes, but as I mentioned this time ive been unable to start it for over a week.
Since then ive been doing quite a bit of research into the immobilizer and DAS systems but ive decided to make an actual post for my issue to better track my problem as I make progress on it. Im currently thinking the issue could be because the vehicles battery is pretty much dead (it seems to hold a charge for a few days if I run the vehicle a bit but I havent been able to) so ive been connecting a large Duracell car jumper pack to it to roll down the windows when the weathers nice and to diagnose the issues im having. Also since I got the car from an auction I dont have the remote key only 2 blade keys (see pic).
So im pretty sure my issue is the immobilizer/DAS, now I just need to find the solution.
Could my issue be that when I connect the near-dead battery (just before connecting the battery pack) the electrical system has too little power when being connected?
Or maybe I just need to order a remote key?
A massive thank you to anyone who took time out of their day/night to give this a read. Any suggestions are very welcome and appreciated!