Definately the rear springs and not fun to change at all, you will need the internal spring compressor and they are about $600, without it the job is nearly impossible and borders on dangerous.

You will need to lift the car, remove the rear seat completely, unbolt the sway bar and remove the rubber snubber stops on the chassis. The upper shock mounts are accessed through holes behind the seat back and are two 17mm nuts jammed together. The spring compressor has two plates which are placed inside the coils of the spring, one top, one bottom, a threaded rod is inserted into the plates and turned to compress the spring. Once compressed the spring can be withdrawn upward and reward past the point where the snubber was mounted. Famous text: "Installation is the reverse of removal"

The compressed spring has a great deal of stored energy and if you get a finger in the wrong place and things give way...You will loose it. Because of the way the spring is mounted only a KLANN KL-0025-1K spring compressor should be used although I believe that MOOG made a copy at some point.

At the end of the day unless you or a friend owns the tool, just pay the 3 hours and be done with it.

Chris

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1971 Porsche 911 Targa RSR rep.
1968 BMW R60/2
1981 BMW R80GS-PD, dual plugs, 1000cc jugs, 10 gal "Gaston" tank.
1982 BMW R80GS-PD, duplicate of above.
1988 Neoplan/Mercedes 40' Bus
2002 SLK32 AMG
2013 Smart Electric