ML 270 Cat Question

oigle

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2003 ML270 sold but not forgotten. 2022 Kia EV6 RWD LR
The guy I spoke to said it would be difficult to fit a piece of pipe because of the odd angles at which the pipe enters and leaves the cat.

Yes, it is an odd shape. I watched while they did the pipe insert on mine. Was a bit tricky but went OK. Didn't watch when they replaced the pipe with the little muffler. Quite possibly they could have taken a bit more pipe out to accommodate the muffler.
Maybe you need to talk to a better tradesman.
If the exhaust shop starts talking about "illegalities", perhaps you could just ask them for a suitable sized resonator/muffler and take it somewhere else to get fitted. I can't really advise as I don't know your rules/regs etc or your local businesses. Is there a local indie who would fit it for you? Seems plenty on this forum are doing such work.
 

Gkinghorn

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E350 CDI Cabriolet - 2011
Agree that most exhaust shops can do this .... Not complicated ...just don't expect Kwik fit to do it...
 
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pace

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Thanks for that, does anyone know of someone in the Reading/Oxford area that could do this for me?
 

richardN2O

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CL55 AMG Kompressor
Unfortunately here in the UK people don't tend to be quite so helpful. Most wont want to get involved with a modification and would rather over charge you for a new cat because you drive a Merc!
Down here in Surrey / Hampshire we have a couple of great exhaust specialists who will basically do anything you ask :)
 

Gkinghorn

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Thanks for that, does anyone know of someone in the Reading/Oxford area that could do this for me?

Try that link I posted..it's a franchise all,over the country...find your local dealer..
 

richardN2O

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CL55 AMG Kompressor
Thanks for that, does anyone know of someone in the Reading/Oxford area that could do this for me?
If you want the best I've used call Matt Dennis at Longlife Basingstoke, which is not far from Reading but well worth it. If you give him notice they can also lend you a pool car.
 

panason1c

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Mercedes ML270CDI, VW Polo 1.9tdi, BMW K1200RS
I made stainless steel cat replacement pipes for my Senator years ago. I didn't get any resonance with them fitted, but the car was old enough to legally not require them fitted for the MOT. Your car will likely need them fitted to get the emissions right on the MOT.

Diesels dont need, or depend on a cat to pass an mot (in the uk). It will sail through the mot, even with cats removed.
 
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pace

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Thanks for all that, I have decided to get it repaired. My mechanic has said he has done it several times. The section with the cat will be removed and re welded. I think this is the best option because it can be done quickly and will the keep the original system intact, it will also will be cheaper. I will look into who can provide a resonator box in case it fails again in the future.
 

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