Long time lurker first time poster here.
Recently acquired a 2005 Manual 520D E60 (M47 T2). It's done 193k and needs a bit of TLC. The glow plugs and relay needs changing, main thermostat (just changed the egr thermostat to get my feet wet), inlet manifolds cleaned, egr cleaned, dpf cleaned and so on.
The car drives ok albeit I can feel that it's been held back power wise mainly due to the things I mentioned above but no limp mode. I plan to tackle them all and try to do 90% of it myself with the exceptions of things like DPF cleaning. Also have a diagnostic cable along with the relevant software's like INPA, DIS etc.
I'm a quick learner and I really want to know more about my car because I'd like to keep it for a while. This is the first time I'm trying to work on any car, kinda scary and exciting at the same time and it's addictive.
Now to the main point, if I put in the key and switch on the ignition (pressing the start/stop button) without turning the power on (like when you're doing diagnostics), I'm getting this:
As I said I really can't tell what's making that noise and why, so I'm hoping somebody has an idea.
It's been like that since I got it and it drives fine and stuff.
Please any help would be greatly appreciated