Hi all. I'm a relatively new Diesel Merc guy. I just picked up a 1984 300CD and I'm going to start learning/restoring. I was thinking about a 240D 4-Speed. I've read all the posts about what to look for when buying one and about the advantages/disadvantages between one and a 300/300 Turbo.

I had one question I couldn't find an answer to: What year did Mercedes change the glow-plugs from the loop-style to the pin-type on the 240D? Some 240Ds work with the pin-type, but older ones work with the loop-style. What year did this change happen? Also, was there an associate change in the engine itself? Do some years have more power than others? What year should I go with?

Thanks in advance.

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Alex
1984 300CD - Silver/Blue - 326,000 miles (sold)
1979 240D - Canary/Brown - 221,222 miles (I love this car)