Thanks for your replies! Just to set the record straight, the vehicle has a new air and fuel filter, and "recently" changed spark plugs and spark plug wires. It did have a valve adjustment only a few thousand miles ago at the most (don't remember for sure). Some of the valves were very much out of adjustment, so it might need that done again. We have never done a compression test.

Chris: I'll take a look at the SL forums.
Also, I didn't know that they had a Camry back in 1985! Sure don't see many of those...

The vehicle is amazingly rust-free, with only small bubbling areas, and no actual rust penetration. Unusual for an old G-Wagen!

Tomorrow I will hopefully have time to check the WUR. If I do, I'll let you guys know.