Brand new set of rear air suspension bags ( these are larger than the front) for your W109. The special purchase will require a special order. It may take up to one week for the parts to be shipped. You will be notified via email of the expected shipping date. See the video below to learn more about how the air suspension system works and where these "bags" are installed.
For W109 1969 to 1973 300SEL 3.5, 4.5 and 6.3
W109 REAR Air Bag Set New Genuine Mercedes