Replace that primer pump.

I had the same symptoms with my 300D a couple of weeks ago. Replaced all 5 glow plugs, didn't fix it. I noticed that my primer pump was leaking so I replaced it and bingo problem solved. Starts like a champ now.

__________________
Joe

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1980 300SD - 495k miles - 'The Ambassador'
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Former Family Members
95 C280
73 280SEL
90 300D
87 300SDL (X2)
86 560SEL
84 300D
80 300SD