Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hello my name is***** am an ASE Master Technician and I am glad to help you out with your question.
The first step is getting an engine scan done for any codes that may be causing the no start problem.
The engines intake manifold needs to be replaced for the p2006 code, the p0025 could be caused by low oil level. Have you checked the oil level?
A common problem for the p0025 is the exhaust cam solenoid, it should only be about $25 to replace. The generic description says that it is the left exhaust cam so I would feel confident with that. The solenoid is behind the power steering reservoir on the drivers side.
Ok so you don't need help, I will opt out and another expert will be with you shortly.
I honestly am trying to help you, I understand this can be frustrating. Keep in mind it can be difficult to diagnose a vehicle over the internet. I am not there to look at the vehicle and use any type of diagnostic tools that are readily available in a shop. I am going by the info that I have which was 2 DTC's and a no start. You need to check fuel pressure, spark, injector pulse, and compression and see which one you do not have. The codes are most likely prior and not affecting the no start at all.
Have you checked voltage at the fuel pump while cranking?
Do you have a wiring diagram for the fuel pump?
If it runs with starting fluid, you have spark, compression and injector pulse, so that leaves fuel pressure.
Do you have fuel pressure at the rail?
Can you hear the pump running?
Is there fuel in the tank?
Do you have injector pulse?
You could have pressure to injectors but they are not opening or closing, you should have 12 volts to each injector and the pcm controls the ground
Do you have a noid light?
You can make a noid light out of a license plate bulb, remove an injector connector and insert the bulb connectors into the harness, the bulb will blink while cranking if you have a pulse.
Connect the bulb in series, polarity does not matter.
This could be related to that exhaust cam solenoid dtc that you have stored. The power for the injectors goes through that solenoid.
I am looking at the wiring diagram now.
p0025 is the code for the exhaust cam solenoid
The next step is to connect a fuel pressure gauge at the fuel rail.
Hello again Dan here,
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Let me help some more. Is there anything else I can help you with?
If I did not give you 5 star service, please let me know what I missed.
Do you have the code number?
It is common for the thermostat to stick on this vehicle and cause this code.
The ect is on the left side of the engine.
Start with ect but this could also be a thermostat issue.