blackberg

If I where to tune out the Adblue, SCR, DPF do I have to remove the exhaust components, or can I just leave them there?

thanks

kajtek1

Depends on the state - removing them will fail the visual inspection. Lot of owners say they don't have smog at their county, but those laws keep coming, so if you plan to keep the car for few years, better be ready for them.
Best IMHO way to do it is chisel out DPF honeycombs. That is what I did.

blackberg

Not to worried on the visual,

So the exhaust components is just the dpf?

i could chisel it out, just can’t immediately do it, can it run sometime with it on without any issues ?


Thanks

kajtek1

You don't have any diesel listed in your profile and you did not say what engine you have in mind?
When DPF removal on OM651 is child's play, doing so on OM642 is quite a task.
Driving it with honeycombs and DPF delete will eventually clog the DPF, so don't plan on doing it long.

blackberg

it’s a 2010 GL350

and a 2011 E350

both bluetec

kajtek1

Always add "Bluetec" to MY as 350 alone would indicate gasoline engine.
Bad news those are OM642 engine, pretty hard to work on.
Have fun.

00Coupe

Buzzken makes replacement pipe, which Im sure any exhaust shop can also fabricate.. They don’t make one for one for E350, which is also what I have..

I also plan on replacing mine one day, but for now everything works..

the one tune will just disable the bluetec system (nox sensors, SCR, and uria spray) But also option for full delete (EGR, swirl flaps, DPF)


Im not sure why everyone hates on the OM642 engines due to emissions if it can all be simply,
removed..😀 In reality it will be same as the older generation cars..

kajtek1

I sold my pre-DEF OM642 with almost 190k miles and know the buyer, so the engine performs well and having records from original owner - still original DPF.
Lot of things come to play in last years.
Now you can buy ScanGauge, who will monitor soot build-up and tell you regeneration status. That sure can avoid lot of troubles when you observe it and make extra loop to avoid shutting the engine down with pending regeneration.
MB also shoot itself in the foot with making complicated unit for DEF tank. Small heater burn out cost a fortune for whole unit replacement, than SCN coding comes to play.
On older diesel you can have new O2 sensor for about $100.
On DEF -equipement cars you have two Ox sensor, who replaced in pair can run you $1800 at stealer. Not much to love when it comes to it.

00Coupe

I had weekly CEL for pre SCR nox sensor..

I monitored the results on scan gauge and it would randomly spike for high ppm.. The secondary sensor worked fine..

Like you said the sensor at the dealer quoted me $850 plus tax for just the sensor..

I found an aftermarket part for $75 with shipping and it has worked flawlessly for the past few months..I just had to splice in the new sensor to old module (8wires)

The sensor readings are now much more stable with very quick response ( for example once you let off throttle)

I completely agree, these cars need long highway drives and cannot be treated as a short distance city car..

Etienne Lau

What after market part for the NOX sensors. Both are bad on my vehicle.

00Coupe

I ordered from aliexpress.. lots of good reviews on them from Europe..

blackberg

So you did the tune on the e class with removing anything?
Thanks

00Coupe

I have not done a tune.. My car is all stock other than the sensor replacement above..

If I start having issues with bluetec or DPF, its all coming out and a tune will be done at that point..

I do mostly long highway driving, so i foresee this system working a long time.. Currently 215,000km