It looks like my car C200 W205 M274 has an EGR attached to its turbo. My aim is to gain some power by blocking or deleting this EGR. The last basicaly run unburnt gas back to the engine. My deleting this EGR I hope to run the car on fresh air only ie more breathing hence more power.
I understood that I can block this EGR port by a piece of metal.
Does anyone know what are the pros and cons for deleting this EGR.

 

I would do this by programming the egr to always be open. It will give you some extra power and more important a cleaner engine. Your car will push out more pollution as a downside

 

Have you done this?


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Close egr valve not open .

 

yea was somewhere else with my head when writing this
i've done this on my petrol car before after it had a failure. now i drive diesel so its a different story for me

 

so physically you can block it up with a plate, but you will need to program to clear off the CEL permanently. It can be done as part of the tune too (if you intend to).

 

The car has Brabus Power Box on it. I have no intention no tune it any further. It looks like I need professional help. I will seek dealer advice so they block it off and clear any CEL. I am not sure they will accept to do the job. I might do it somewhere else if it will give better response and extra power.

 

Since you have to have the software modified I would upgrade to a remap with egr off so the egr remains closed .

 

The car is a C200 I already installed a Brabus power box which gave me roughly exta 35 hp. I dont think my engine can handle more. Hence no plans to remap. I might just seek software change to close the EGR. My question does it give more power to the car better response less lag? If none then wats the point of deleting it.

 

It does as ALL the exhaust gasses are then used to low rpm spool the turbo , so more torque earlier , less smoke out back because of more oxygenated , more compete combustion
( unburnt fuel molecules are soot ) , less soot in engine oil so it stays cleaner for longer .

Inlet manifold doesn't get as gunked up with as much soot combining with normally occurring crankcase oil vapour .

Remaps are way safer than boxes .

 

Thanks for your explanation, what you said makes sense as the car will be breathing only fresh air. So more fresh air better combustion hence better response.
Sadly, I live in Beirut, tuners around here are not professional and good luck with getting your car fixed after the tune. A friend of mine tuned to stage 1 only. The car wouldn't even start. He took to MB dealership to get it fixed. It cost him 650 usd just to get the car back to stock and get it to start. That is why I thought I might just buy a Brabus box and get the dealer to install it. Now the question is I need to find someone here to close the EGR I am not sure the dealer will accept to do this job? I will have to ask them when they open. The country is fully shut down under 12 April because of Corona.

 

Quite a place to live I imagine .

The response is from turbo spool by all the available exhaust gasses .

Spoilt for choice for remaps here , rare to hear of a bad author .

Something to chew on about the boxes..

https://www.p-v-e.co.uk/tuning-boxes/

 

Oh well its too late now. Quite an expensive box. To be frank it changed the car more response less lag more power. In addition, nock wood, it has been two years since I installed with no issues or malfunctions.

 

They do a job but lack refinement , over pressurising the fuel rail is possible as fooling the ecu , mpg is also fooled to show a false better fuel economy .


Does your car exhibit drive by wire throttle delay ?

 

I searched for drive by wire delay. Ok it doesnt after installing Brabus.

 

Auto or manual ?

 

Auto.

 

Perhaps 205 delay sorted but 204 definitely had one .

 

Hey, did you end up blocking or deleting the EGR? Is it worth it?

 

Nope, the dealer advised me not to do so. He explained that i might face some issues. He added it wont add a significant power. Hence I decided to keep it as is.