88 560SEL which trailing arm bushings to get?

[wawago]

Hi, I have an 88 560SEL with low rear ride height. From the forum this is a very common problem for the aging w126. Possible solutions are to replace:
1. L and R subframe bushings
2. L and R trailing arm bushings
3. L and R spring spacers
4. possible L and R springs

I believe the ride height problem for my car is due to the first two items.

I have bought two subframe bushings already
but for the trailing arm bushings do I need four for my car? One for each corner or two for each corner? Can I just install the rear two? Lastly, there seems to be two types of trailing arm bushings: regular L2006-27454 and with eccentric interior bushing L2006-16072. Which one should I get?

if anyone knows the link to detail trailing arm bushings replacement it will be greatly appreciated. Thanks

Rick