Exhaust

The previous MOT had an advisary warning of exhaust gasses leaking from around the manifold area. I had also noted this myself.

The Mercedes EPC (Electronic Parts Catalogue) shows a seal ring (N915035000008) in the incorrect place, or atleast a misleading position in the diagram (although it does correcly show that x2 are needed). It shows it as the connecting seal between the exhuast pipe and the collector pipe. It should, infact, be between the collector pipe and the engine manifold. Two seals are needed. These are copper crush seals.

The seals fit onto the downpipe as shown:



As access is diffult removing this piece (not very much room to turn spanners etc), and that two people are required to replace this (one person in the engine bay, holding a 13mm spanner on the bolt, whilst the other is under the car with a long ratchet on the nut), I decided to also purchase a set of new bolts:

N000931008244 – (x4) screw for collector pipe to manifold
N000933008168 – (x2) screw for exhaust to collector pipe

I reused the existing nuts.

I also applied (for good measure) some exhaust paste around the seal area and also in the join between the collector pipe and the exhaust pipe.

I took this opportunity to fit 4 new exhaust hangers on the car as the old ones were non-genuine and looked past their best; A1074920082 – (x4) exhaust hanger



All bolted back up and no more exhaust leaks :)

finally, the exhaust tip was given a coat of aluminum exhaust paint:



EDIT - Since posting this and using the car, a repair I did to this collector pipe has failed so I have had to fit a new collector pipe. This has made by exhaust 100% leak free.