Thanks for responding. Yes, a very old thread for sure.

By any chance do you have the part number of the cylinder head sender?? I have the wiring diagram for the 91 300SD and SDL but the darn thing does not show the wire to the T pin in the relay....so I did not know where they were picking up the temperature input.

I have a recommendation from Beru for the glow plugs but have not purchased them yet so another possibility sounds reasonable too. Do you have a preference for Beru versus Bosch??

It is winter in Michigan, so the car is put up out of the salt and I have time to play with it.

Thanks again

Frank

__________________
old goat

86 300SDL - 207K
84 300DT - 298K - sold
78 450SL - 97K
61 Porsche - rare T-5 Karmann Hardtop - NO, NOT a Karmann Ghia
99 Suburban 4x4 - 247K all original, the family donkey