I believe replacement accumulators are around $100/side and minimal labour. If the car was driven too long with bad accumulators, the hydraulic rams may be trashed (look for oil leaks) and cost as much as $400 per side and additional labour! It is a hearty system as long as the accumulators are changed at the proper intervals. Cheers, Andrew Seidel.
85 500SEC Lorinser
83 300D Turbo