I have been reading about the spring compressor issue since 2007. Back close to 2007 the specifically made for Mercedes aftermarket spring compressors cost more then they do now and at the same time there was fewer makers.

Now there seems to be a bunch of made in china makers and they cost less but the quality is not so good. Or at lest you cannot separated the good from the bad by looking at an ad.
One would think the ones that Pelican Parts, Baum Tool, El Paso Tool, and Zdmak Tools sell would be a cut above the average but I have never used any. At least you would get some sort of warranty from those places.

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84 300D, 82 Volvo 244Gl Diesel