Hi ,I'm new to this site.I have a very hard starting benz.It also idles very rough.I changed all flters & bled all lines.It seems like theres not enough oil at the pump as it fires and then dies .Does the vacum pump pull fuel into the injecter pump?.I also put in new glow plugs.My question is what next.The car does use lots of oil and smoke some.The car was sitting in storage for some time.It shows 56,000 miles but the speedometer is acting funny so I don't know how acurate it is .If anyone is familiar with this model I would gladly try anything.Thank You GaryH