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Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:30 am
by nub1ru
Greetings, this occurrence is limited to the morning hours. If the ignition is not cycled twice, it will crank for a duration of 10 seconds. No codes and operates exceptionally well.
Re: Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:41 am
by nub1ru
Given that I am in a warm climate, we can eliminate the glow plugs as a factor.
Re: Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:42 am
by GoodWillHunt
Examine your injector leak-off to identify which ones are excessively leaking back.
Re: Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:43 am
by NavemRash4u
Also inspect the return line O-rings, as fuel may syphon back to the tank overnight.
I experienced two malfunctioning glow plugs, and starting issues were evident even at +15°C. However, the coil light was activated immediately upon startup, indicating an issue with the glow plug.
Re: Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:43 am
by nub1ru
I am unclear about how the O-rings on the injector prevent drainage to the tank.
Re: Cls 320cdi 2006 difficult to start
Posted: Tue Oct 27, 2026 9:44 am
by RIVERPLAZAAA
It does not.