You really need to get the car plugged into STAR ideally, or at least some capable MB-specific scanner, like iCarsoft MB V2.0, otherwise you'll end up spending money on unnecessary replacements ...
I've an A200 C169 2006 by the way ... with a few mods ...
Hi Matt.Tell me a bit more about the exact circumstances when it fails to start.
Okay thank you will do that sir and will revertThanks.
Seems like a fuel pressure issue. Try one thing for me.
Next time you want to start the engine, turn the ignition ON for 20seconds. Turn the ignition OFF.
Then again turn the ignition ON for 20 seconds. Turn the ignition OFF.
Then turn the ignition ON and continue turning the key to fire the engine up.
Please report back.