Excellent thats my Monday sorted assuming I can get the parts easily enough, i will let you know how i get on if thats ok

Thanks again for your time and help

Much appreciated

Hi there,

Just met with the mechanic who has serviced the car, he is 100% syre all glow plugs are workking ok, I mentioned all the air in the pipes in the moring and ha agrees that this must be the problem, although he doesnt know where to look, he has suggested replacing a little valve like thing on the block with a pipe on it going to the filter housing its only small but he thinks its a good start, would you happen to know what this part is and if so could it be letting air in, thanks again in advance for any help or info. Regards Mike

Thats going to be the shut off valve (black plastic solenoid) or the lift/fuel pump. Each has two lines, one of which goes to the filter housing.

Tell us which line(s) you see air in???

http://detali.ru/cat/oem_mb2.asp?TP=1&F=202128&M=605%2E960&GA=722%2E436722%2E612&GM=717%2E460&CT=M&cat=19S&SID=07&SGR=120&SGN=04

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

It's not a CDI, The engine is similar to the 2.5 diesel that was in the E300D

Mike
I have a similar problem with my E300D, 1996. I have not gone as far as you yet with repairs. However when I start my car, I push the fuel pedal a little which helps.

One could find and remove the return line on the pump when it does not want to start. If you have fuel at pressure in the system there should be discharge even when cranking I suspect. The bubbles should not be in the fuel supply lines though either. Forget about the injection pump itself right now.
Another check might be to loosen the #1 injector line a little on the
#1 injector when it will not start and look for fuel pulses. Or spray a little wd40 into the intake. If the engine fires right away you have positive proof it's fuel supply related.

The posters IP and fuel lines are identical to that used in the OM606.

Able - You can push your gas peddle as much as you wnat when starting, it wont do anything. It is a fly by wire system. The computer will meter the required fuel until startup occurs. What is helping you is the fact that you are cranking it and therefore repriming the fuel system. Try keeping the tank above 1/2 full and parking nose downhill at night instead. Look for air in your fuel lines when you get a chance.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Firstly a big thank you to everyone contributing to my problem, Ok heres the latest, this morning I checked the fuel lines prior to starting and there was a few tiny bubbles in 32 a big one in 56, but there was a lot more fuel than bubbles unlike some mornings, she statred perfectly this morning, god knows why, and after 2 seconds I looked at all the fuel lines and 32 was clear 56 a quite a lot of bubbles but 74 had even more and while the car was running every time a bubble whizzed past in pipe 74 the engine would immediately cut out / miss for half a second, this continued for 2 mins until the fuel ran clear and then she ran smoothly.. so yes air did get in over night but only a little.... now going to check remove and check fuel lines for any signs of a obvious fault and maybe the fuel filter too. and let you know what I find. Thanks againto all, I feel we are really getting some where, if a resolution is found im sure many other people could learn a few things from this thread. Best Regards to all Mike, off out to get oily..again

You have a bad seal where line 32 plugs into the pre-filter, at the big oring beneath the pre-filter itself, where line 56 plugs into the fuel filter housing or all of the above.

Remove those lines and observe the orings. They are supposed to be round. If they appear to be oblong in section, they need to be replaced.

You've now ruled out everything prior to the pre-filter and after line 56.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

Superb, have purchased some torque head sockets, fuel lines and o rings on order, watch this space. Thanks Guys

hi guys , new to the forum. have a 1997 c250 with the same problem. i was trying to have a look at that diagram that tmallison posted here but cand open it as service is unavalable. has anyone got a copy of it or point me to one.thank you.

'Shame, really.
'Those were some great diagrams in a user friendly format.

The Mates over @ http://www.mbclub.co.uk/forums/

Have much more experience with the 5cyl 20 valve DOHC W124 chassis.

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'84 300SD sold
124.128

thanks for the reply. i,ve been there and same link for this. thanks again.