Fuel Delivery and Air Induction: Service and Repair

Removing And Installing/Replacing Supplementary Air Line (S54)

Remove microfilter housing.
This operation is described in the section "Remove heater bulkhead".







Press locks.
Detach engine venting hose.







Detach vacuum hose (5) from auxiliary air line (4).


NOTE: For a better overview, this work step is shown on an engine that has been removed.







Press lock together and detach air hose (1) from auxiliary air line (2).


NOTE: Illustration shows intake air manifold removed.







Release screw connection of fuel injector strip and auxiliary air line on left and right.
Pull out auxiliary air line together with pipe socket towards top.


NOTE: Illustration shows intake air manifold removed.







Installation:
Check O-rings on pipe sockets for damage, replace if necessary.
Coat all O-rings with petroleum jelly or with SAE 90 gear oil.