For completeness sakes...

for the bottom bolt, you can't hammer a 12-point socket onto it, because it's up in a recessed area. However, drilling it out is very easy and works great.

Also, I had trouble getting the inner 6MM bolts on each side. But I found after getting the outer bolts off, and pushing the mount back and forth... it breaks the inner bolts loose and they can be removed easier.

Finally for the passenger side, I definitely had to remove the air filter and the air filter mounting arm...

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1987 300D - Frybrid - sold
1985 300SD