Hybrid_Singh
Member
- Joined
- Jan 15, 2022
- Messages
- 14
- Reaction score
- 1
- Your Mercedes
- 2005 Mercedes S320cdi (W220)
I am based in the UK and the weather has changed dramatically over the past week. I purchased a 2005 model S320cdi Mercedes S class for my daily highway commute. (80 miles) This is a well looked after example only done 80k miles and I bought her 3 months ago and has been a fantastic car to drive and very comfy and has a full service record.
My issue started 4 weeks ago where it took 2 attempts to start one day and then would be fine all day. Then gradually got more regular 2xs b4 it would fire up. No codes were displayed so was a little puzzled so on advice of diesel technician replaced glow plug relay from euro car parts (Hitachi £42 unit) it still took starts before it fired up after fitting, however next day fired up first kick. Then it went back to 2 crank start and then yesterday it was worse, 5 cranks and then coolant light visit workshop came on? Later I did my 40 miles highway run and its drives superb, 4 hrs after parking up really hard start, 8 cranks b4 it came to life. Although once it's warm it fires up everytime. The only message on Cluster which appears is Coolant light visit workshop everytime this occurs and then dissappears when I recycle the ignition again. No other codes recorded.
I have also replaced glow plugs, injector rail, quantity control valve and also had the injectors tested and they are perfect. Strangely if I leave the car parked for a few days it starts up.perfectly fine and then gets worse after 2 days of my daily commute.
I am posting today's rail pressure live test result screen shots from my Diagnostic tool, first one is whilst car is stationery from cold to see levels and the second one is cranking whilst it is not firing up. It is clear on this that rail pressure is very low, but once its fires up it goes to 250-360 bar pressure.
Any advice would be great as im not ready to give up on this beauty just yet.
Thanks in advance, BTW fuel filter was replaced in February.
My issue started 4 weeks ago where it took 2 attempts to start one day and then would be fine all day. Then gradually got more regular 2xs b4 it would fire up. No codes were displayed so was a little puzzled so on advice of diesel technician replaced glow plug relay from euro car parts (Hitachi £42 unit) it still took starts before it fired up after fitting, however next day fired up first kick. Then it went back to 2 crank start and then yesterday it was worse, 5 cranks and then coolant light visit workshop came on? Later I did my 40 miles highway run and its drives superb, 4 hrs after parking up really hard start, 8 cranks b4 it came to life. Although once it's warm it fires up everytime. The only message on Cluster which appears is Coolant light visit workshop everytime this occurs and then dissappears when I recycle the ignition again. No other codes recorded.
I have also replaced glow plugs, injector rail, quantity control valve and also had the injectors tested and they are perfect. Strangely if I leave the car parked for a few days it starts up.perfectly fine and then gets worse after 2 days of my daily commute.
I am posting today's rail pressure live test result screen shots from my Diagnostic tool, first one is whilst car is stationery from cold to see levels and the second one is cranking whilst it is not firing up. It is clear on this that rail pressure is very low, but once its fires up it goes to 250-360 bar pressure.
Any advice would be great as im not ready to give up on this beauty just yet.
Thanks in advance, BTW fuel filter was replaced in February.