Cold Start Problem

[tlovidiu]

Hello,
I've got a C200 1999 TDCI.

When it got cold, I got problems starting it.

1) I put the key, wait 60 seconds, try to turn it on...
2) It starts stays 1 second and dies (even If I press the gas pedal)
3) I wait other 60 seconds, try to start, with a long key about 10 seconds and it wont start or it would start (thirt key usually).

If the water indicator stays over 40°C it starts without problems.

What could It be?

 

[Tinkerer]

I would check the glow plugs initially as these usually give this type of problem, if they pan out OK go for the glowplug control unit.

 

[tlovidiu]

The glow plugs are ok.

 

[Alex Crow]

Sounds like an o-ring allowing air into the system, especially if it starts for a split second before it cuts out, as you say.

 

[murray motors]

change all your plastic fuel pipes or take them off and change the rubber seals on the ends do them one at a time and watch you dont nip one putting it on