Not being much of a minwax fan, I have to ask why you used it, since it's water based, and the varnish is oil based, and would be much harder to match. Do you know of any oil based stains that are supposed to work? Did you work off of a DIY sheet? Was that here?

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1983 300D, the "Avocado"
1976 240D, 4-spd the "Pumpkin", SOLD to Pierre
1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002