W126 Rear Shock Bushings, Changing

[skylane]

In an attempt to get my 87 560SEL ride back to MB quality I replaced the accumulators. They were shot. The ride improved about 90%. But I still feel a little thump. In reading the threads it seems as if the next easy fix might be the shock bushings. I reviewed my MB Service Manual (cd) and understand how to r&r the rear shocks, I think. Can the top bushings be replaced through the access panal behind the rear seat or do the shocks have to be removed? MercedesShop.com only shows what appears to be the bushings for the top. What about the bottom bushing?

Thanks for any help. My previous thread about the accumulators was a great help. Other than being messy it was a easy job with great results.