Hey Paul and welcome to the fourms! There is so much info here for you to absorb that you could read for several lifetimes. Always ask if there is something we can help you with.

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1981 300D 147k
1998 VW Jetta Tdi 320k
2001 Dodge Ram 2500 141k
1979 300D 234k (sold)
1984 300D "Astor" 262k(sold)
Mercedes How-To and Repair Pictorials
I love the smell of diesel smoke in my hair