It really isn't that difficult. One needs a spring compressor, a jack, and a couple of jack stands. (and stardard tools as well) And don't forget to ask your friend(s) over for pizza too ... the extra hands do help.

Or, your Indy can do it.

Several of us in my neck of the woods lowered our W124s and I'm going to do the same to my W201 ... I just purchased Eibach Pro-Kit springs and will be installing Bilstein Sports as well. The car should be lower by approximately 1.5", like yours, and I will then adjust the heights via the pads. The pads are really inexpensive too ... they average between 5 - 8 bucks each. I bought several sizes and returned what I didn't use.

Hope this helps.

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1992 500E (Daily Driver)
2004 Porsche RUF 955 Dakara 550