I found a good deal on a 1988 300D, but haven't looked at it yet. I was wondering if there is anything I should look for when I do go to check it out? Does this car have a 5 or 6 cyl engine? If it's a 5, does it have an aluminum head? And if it does have an aluminum head, is it as problematic as the 6 cyl heads? Thanks for any info!

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87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head