Om642 resonator / silencer o ring

[Chrisbuktu]

I noticed when tracking down an oil leak in my cls 350 (om642 engine) that the resonator box does not have the o ring/ seal installed and is leaking oil.
Does anyone know what type of o ring I need for this and where I could buy one?
The resonator box is part number A6421400087
Many thanks

 

[W1ghty]

I noticed when tracking down an oil leak in my cls 350 (om642 engine) that the resonator box does not have the o ring/ seal installed and is leaking oil.
Does anyone know what type of o ring I need for this and where I could buy one?
The resonator box is part number A6421400087
Many thanks

MB parts dept ?

 

[Chrisbuktu]

I think they will want me to buy the whole unit but I will give them a try thanks

 

[OneForTheRoad]

O rings on eBay .or Toolstation.

 

[Chrisbuktu]

O rings on eBay .or Toolstation.

I did consider this, but figured I'd end up with 1 o ring that almost fits and 499 that don't.

 

[OneForTheRoad]

I did consider this, but figured I'd end up with 1 o ring that almost fits and 499 that don't.

You'll just have to ring around .

£2.45 for a box full . Try wrapping plumbers tape around it if funds are the issue .

Or measure the diameter required and buy ONE on eBay .

Or for £15 . This

 

[Chrisbuktu]

Cheers. I've ordered the whole resonator. If the issue is resolved for £15 I'll be a happy man

 

[OneForTheRoad]

Cheers. I've ordered the whole resonator. If the issue is resolved for £15 I'll be a happy man

Have a look at the pcv and turbo oil seal , if oils getting to the resonator box .

 

[Chrisbuktu]

Have a look at the pcv and turbo oil seal , if oils getting to the resonator box .

It's only a very small amount of oil (this o ring must have been missing since I bought the car) but it's definitely there. The turbo oil seal had failed and replaced recently. Should there be no oil whatsoever in this location?

 

[TeddyRuxpin]

Sorry to go off topic, but where is this located in the engine? What does it do?

I don't recognise it - thanks!

 

[OneForTheRoad]

It's only a very small amount of oil (this o ring must have been missing since I bought the car) but it's definitely there. The turbo oil seal had failed and replaced recently. Should there be no oil whatsoever in this location?

Possibly egr related .

 

[Chrisbuktu]

Sorry to go off topic, but where is this located in the engine? What does it do?

I don't recognise it - thanks!

Near the filler cap, next to the vacuum pump.
I think it silences the exhaust. Have heard of people blanking it off to change exhaust note.