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91dm Im just 2 hours up the road at Carlisle, a pdf would be of great help. I have got a pocket manual but gives limited information. Trying to get info on these cars is tiresome doesn't, seem to be much out there. I will send you my email if thats ok. Regards

just surfing the net and came across an article about the 606 engine fuel pump being fitted with Pulse Width Modulation control. There is also a youtube video showing a 606 engine running very poorly (fluctuating revs) and sounding very knocky at idle. It aslo mentions that these PWMs can go...

Dieselman done a diesel flush a while ago and it didn't do anything. Changed the oil again about 1000 miles ago and its still clear as the day I put it in the engine, engine is spotlessly clean.

Olivier. I know the engine runs ok but the problem still exists and needs to be fixed. im just thinking, thousand of miles down the road it could be bad for the engine. I just want the engine to run like it was before.

1998 E300 td, 49700 genuine miles. Has anybody out there ever replaced the fuel pump advancement/retard timing mechanism, which is located on the back of the pump drive sprocket. As i have a gut feeling that mine has somehow jammed in the retarded position following very (suddenly) bad...

Olivier I done what you suggested and the engine is still knocking and bubbles in lower most fuel line. Slacked off injector number 3 and knocking seemed to go away, replaced number 3 fuel delivery valve crush washer and O ring but made no difference. No smoke from exhaust, plenty of power...

Olivier. Was you engine experiencing knocking? and did fixing the o rings cure the air trapped in the system and the knocking?

Thanks Olivier. Will do this over the weekend, but will PTFE tape react to the diesel? I don't want it to start breaking down/dissolve over time and get into the system. Just a thought, anyway I will give it a try and fingers crossed there is no more bubbles. Cheers

Olivier. the air can be seen in the lower most fuel lines and also the one from the filter head to the top of the SOV. Can the fuel heater be bypassed? is it really needed.

As there are still air bubbles in the system, surley this would cause a drop in fuel pressure at the fuel delivery valves therefore the injectors won't operate at the correct pressure! Because i have replaced all fuel lines and filters with MB parts, you would think the O rings on the fittings...

carried out a diesel purge this morning using liquid moly and within 2 minutes the knocking was completely gone. Engine sounded brand new. Purged diesel for about 10 minutes, then connected fuel lines back up and took car for a spin. When I got back home I let the engine idle and the knock was...

Dieselman. What are the chances of one of these mechanisms getting stuck/jamming. When I altered the advancement on the pump , the engine knock stopped and when I returned it to its original position the knock returned but only half as bad.

Hi Has anyone got an exploded diagram or pictures of a dismantled Bosch fuel pump for the 606 engine. Im needing information on the timing advancement mechanism. Thanks.

Dieselman. what's your thoughts on this problem, if you don't mind me asking. Thanks

Thanks Johnsco Not going to tackle this job till next week, going to run a diesel purge first using Liqui Moly to see if that will shift the dirt if there is any.

Johnsco you say that im likely to make it worse than make it better if I attempt to clean the valves. Why? Is this a complex job? im a very handy DIY with the spanners and I understand that cleanliness is most important. Have you got any info you can share such as torque settings for the...

spoke to a mercedes diesel specialist today and told him the full story. He says that the knock is caused by the dirty fuel valves in the top of the pump, resulting in insufficient fuel pressure reaching the injectors. The remedy is to remove each valve and clean and replace O rings, taking care...

after trying everything else i could think of, including new fuel system parts and injectors, i eventually advanced the pump timing. i dont know by how many degrees, i just listened to the engine until the knock dissapeared. It runs 99% ok now, but i will have to sort the problem eventually. i...

adjusted pump today and knock has 99% dissapeared, you can only just still hear it in the background but its a soft noise. Advanced it using the adjustment screw until it stopped knocking. Dont know by how many degrees, i just used my ear. The pump wont be far away from being fully advanced...

done compression test and readings were 27-28 bar on all cylinders, autodata says compression should be between 18 and 35 bar. so engine is good. check cams and crank for timing alignment and there spot on. checked timing chain tensioner and that looked and felt ok. now looking at the...