Wagon issues are pretty much the same as the corresponding sedan issues. I can think of two additional, small things.

The wagons all have self leveling rear suspension. At about 10 years of age the accumulators - the nitrogen cells - need to be replaced. The ride will get hard and bouncy when it's time. Accumulators are about $90 each from sites like this, and are a reasonably straightforward DIY.

At about the same age the tailgate struts will get weak. At first the tailgate won't want to stay open on cold days, then warmer days, etc. Again, replacement is not too bad, cost is perhaps $90 bucks for the pair.

Everything else is about the same as the corresponding 124 or 210 chassis sedan.

I drove a 2001 wagon a few weeks ago and it was a darn nice car. Very impressively solid, quiet, smooth, and comfortable. I was almost tempted to sell my 124 wagon and trade up.

- JimY