Hi all,

The previous owner of my '69 300sel (W109) changed the suspension from air to spring. However, the "two in one" air pump (for the suspension) and power steering pump was not changed. The ps pump is now leaking oil quite badly and I am considering taking out the "two in one" pump and replacing it with a new ps pump from w108 or 114/115. Does anyone know if they fit? What are their part numbers.

Q2. If I were to repair the current pump to fix the oil leak, can I disengage the air pump so that only the ps pump at the back runs and the air pump doesn't? Do you think this will take some stress off the engine? Thanks in advance.
- Han