Hello everybody
Thanks for all the replies! I am going to take the car out of the shop, and I will replace the control arms myself. They cost 420$, plus I need to rent a spring compressor. We did the whole rear end (subframe bushings, diff mounts, all links) so we should be able to install two control arms. I signed for an alignment, and I agreed on the tie rods, I probably have to pay something, even though they did not manage to do the alignment. The shop is Chambers in Boston, MA.
Regards, Bruno

PS: I f anyone reading this post is willing to rent his Klann spring compressor to me, I'd be happy to accept his conditions (deposit etc.).

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1992 300TE 137'000