View Full Version : Glow Plug Module Part Number/ Type

12-11-2013, 06:14 PM
I finally pulled out my glow plug module today after gathering the parts to do Surlyoldbill's conversion to external fuses. What I found was a different module; A 648 900 00 00 Q 01. From the little bit of info I could find, it seems to be the second revision, but not the current part. Can anyone confirm whether or not this part has the auto-resetting breakers?

Thank you,

12-11-2013, 06:27 PM
I just popped it open for a look; seems like an all solid state device, so I assume it's the resetting one. I guess I'll put it back in and go ahead and change the glow plugs.

12-12-2013, 02:09 AM
I verified the part number in MB EPC - it shows the same number.


12-12-2013, 06:58 PM
I just changed out two of the three bad plugs indicated by my Scangauge. They came out quite easily, which was a big relief. I searched a lot and couldn't find any info about this module. With new glow plugs installed, do the breakers reset automatically, or do they need to be reset with a DRB-III or DAD?


12-13-2013, 12:02 AM
Visually, the revised module is thinner front to back (the "bottom" being the part that bolts to the chassis).

01-10-2014, 03:16 PM
Just an update to answer my own question. Last week I changed two more glow plugs and haven't had the CEL come on since. It appears that the module A 648 900 00 00 Q 01 is self-resetting with no outside computer input needed. If you have this module it seems you can just replace the bad plugs and go.