I have a C220 diesel 1993, the engine will not crank at all most times,
the starter Motor is fine (Will work with direct connection) is there a starter relay in this model or can someone suggest any other cause ?

Not sure about the oilburner but on my 95 E420 there was a starter relay on the firewall behind the the dash cluster it is silver in color !!!


Smokie

Check this thread.

http://www.peachparts.com/shopforum/showthread.php?t=112468&highlight=dimmi

My problem was resolved by replacing the ignition switch.

Thanks I will give that a try !! still interested to know if relay present in this model.

The Ignition switch seems ok, a direct connection from ignition switch output to starter motor cures the problem - anybody know what is between the switch and starter motor ?

The Neutral saftey sw .

Try N instead of P next time.
The is also a ATA Security sw , but start at NSS first

What is the ATA security switch ?, (In this model there is no immobiliser!!)

If the car has no security, then it has no ATA !!

So. you are back to the NSS , which is between the ignition sw and the starter...