Question about glow plugs. I have a set of 5 Bosch glow plugs with "1ST/PC 0 250 201 039-3B0" stamped on the box. These were purchased for an 83 300D turbo but never installed. I want to sell them on ebay, and I've seen other listings for "250 201 039" but I don't know what the "1ST/PC" or "3B0" designates. Really what I'd like to know is which vehicles these plugs would fit. Can I tap ya'lls knowledgebase? Thanks.