Glow Plug Replacement
 

I replaced the glow plugs in the 96 E300 this weekend, it seems to have corrected the CEL but now on cold first start of the day the engine does not run smoothly right at first as before. Did I miss something or did I get a bad set of GP's? After the first start it does fine. I removed the old ones and installed the new ones (Bosch Duratherm) The parts man stated that there were two different GP's listed but supposedly gave me the correct ones. Could they be wrong? I plan to ohm the gp's from the controller this afternoon to see if any are bad. Is this common to get bad gp's?

i think they just need to be broken in, mine did that when i first got new glow plugs. give it a month or so.

Thanks, I think you may be right. They seem to be working better the last few day's