SLS Problem on this wagon? See pic
 

See the picture, does this thing have a self leveling problem? Looks like the back is lower than the front.

Also, what are the signs to watch for. Never owned a wagon and am curious.

Measure the distance from the horizontal trim strip to the ground in front and in the rear. The wheel wells are spaced differently and can make the rear appear lower when it may not be.

Here's a link to help Diagnose your SLS

Probably has SLS. Most (all US models?) do. If the control valve is leaking internally , they squat when not running and rise when the pump builds pressure.

It looks okay to me. But, they can be a bit hard to read sometimes, because the rear fenders are lower than the front. Like Chad suggested I would measure it. The biggest problem with the wagon SLS is leaking. Leaking makes the rear end sag when it sits. If everything else is working properly the rear will raise up when you start the car. Also you should have a couple of people sit in the rear and see if it lifts up. Usually if the people put their feet on the ground they can feel the rear lifting. Also look in the SLS fluid reservior. The fluid should be clean. If it's black and looks like oil then there is motor oil in the system, and the pump needs to be resealed.

Also look for rust at the bottom of the hatch. They like to rust there.

most likely has sls. I don't think theres that many TD's without them. haven't seen one yet anyway.

but if you want to make sure, you can open the hood and look closely inside. there's usually an oil reservoir about the size of a milk jug by the passenger side next to the fender. Also, by the rear wheel well under the car, you should see the accumulators (one by each rear wheel). they are round, black spheres that look like cannonballs. and of course, theres all the metal tubing running to the components.