Say goodbye to all issues!

Deleting

DPF error

AdBlue error

DEF error

EGR error

For Mercedes Diesel

We have developed a special OBD module that solves all problems related to the emission control system. No more hassles starting your car in just 3 minutes!

Delivery Worldwide just in several days

Find Cheaper Solution, Get Personal discount!

1-year warranty for each OBD module included

24/7 customer support anytime you want

MERCEDES-BENZ W205 NOX SENSOR TECHNICAL GUIDE AND SOLUTIONS

Live Examples Of Errors

What errors usually look like

Check Your Dashboard

Have you ever seen such lights?

If so, it's likely due to an AdBlue EGR, DPF, EKAS- related problems

Also Known As

The most common errors

Exhaust Fluid Reserve!

Refill Exhaust Fluid!

15 Starts Remaining!

Cannot measure fluid level!

Engine Start not possible in *** km (mi)!

These are the most common errors you may see on your dashboard

ANY QUESTIONS? WE’RE HERE TO PROVIDE answers — JUST ASK!

Persistent dashboard warnings usually start with one stored fault and then turn into a daily-use problem for the owner. On this page, we focus on nox sensor mercedes w205 and explain how our handheld solution helps clear the active restriction on a Mercedes C Class without immediate replacement of the original part. This is written for owners who need to keep the vehicle in service when the light stays on and normal use becomes uncertain. For Mercedes-Benz owners, one Mercedes warning on the car often points to one stored NOx sensor path before any other change is considered.

When this W205 issue becomes the main problem

Our company supplies one direct tool for the W205 platform when a stored NOx path remains active. In practical use, owners often search for W205 NOx sensor, NOx sensor fault W205, indicating NOx sensor, upstream NOx sensor, sensor failure, or diesel nitrogen oxide (NOx) sensor probe when the dashboard warning does not clear. The goal is simple: restore normal use of your vehicle without immediate sensor replacement. For Mercedes-Benz fitment, this matters because the Mercedes car can stay limited even when the same sensor has already been checked once. It also matters for Mercedes-Benz owners of the C-Class platform who want a direct answer before the car loses daily usability.

This page stays narrow by design. It is focused on the Mercedes C Class and the stored warning linked with the NOx sensor only. We do not turn it into a broad auto catalog of unrelated parts, doors, security items, or mixed accessories. We provide one technical solution for one W205 fault path. The same Mercedes-Benz warning can appear on a sedan or coupe, but our Mercedes-Benz setup remains tied to the exact car and the exact sensor history.

How owners usually describe the warning

Search language varies, but the intent stays the same. Some owners compare an oxygen sensor by mistake. Others mention an oxide sensor, a temperature sensor, or a sensor replaced earlier, but the warning still returns. Some searches also compare Classic Mercedes, E-Class overlap, or other Mercedes-based pages before they find the correct W205 content. On this page, we keep the focus on one model, one motor family, and one stored NOx warning. In some Mercedes-Benz search results, owners also compare CLS pages, Mercedes-Benz listings, and Mercedes-Benz fitment notes before they confirm the right car and the right sensor path.

Used when the warning light stays active after restart
Relevant when the owner wants to keep the original part installed
Focused on W205 NOx sensor cases only

What our solution does

The tool connects through OBD and applies the required script to clear the stored dashboard restriction. It does not require immediate hardware change. That matters when owners need a direct answer instead of repeating trial-and-error with the NOx sensor. For many owners, this is the top practical step when continuing use of the vehicle is more important than starting a larger repair right away. For Mercedes-Benz users, the main benefit is simple: the Mercedes-Benz car can return to normal use without forcing immediate parts replacement over one stored NOx message.

We keep this page technical and specific. It is not about unrelated sensors, not about door electronics, and not about security functions. It is about one W205 warning path and one direct result: remove the stored fault connected with the NOx sensor so the owner can keep driving. This Mercedes-Benz approach is based on the exact warning path, the exact Mercedes-Benz model, and the exact car behavior after restart.

Before ordering

To prepare the correct setup, we may ask for the exact model year, the dashboard text, and basic details about what happened before the light appeared. That helps us confirm whether the stored message belongs with the NOx sensor and whether sensor replacement was already attempted. For an owner dealing with the NOx sensor Mercedes W205 topic, this is the cleanest way to move forward without unnecessary downtime. Mercedes-Benz matching also helps when the same car showed one warning, then another, and the owner wants Mercedes-Benz-level clarity before ordering.

No bundled products or unrelated parts
No need to replace hardware as the first step
One advanced but direct solution for a stored W205 NOx warning

Question by Tyler • Published on April 21, 2026

How do I clear a NOx sensor warning on a Mercedes W205?

My Mercedes W205 keeps showing a NOx sensor warning and the light comes back after restart, and I do not want to keep replacing parts if the car still needs to be used every day. Is there a direct way to clear the stored dashboard fault properly and keep driving while the original sensor stays in place for now?

Answer by OBDtune Team

✅ Price: from $559
✅ Compatibility: Mercedes Vehicles All Types
✅ Worldwide Delivery

For Mercedes W205 NOx sensor fault cases, our handheld OBD module is often the most practical solution because it clears the stored dashboard restriction without making immediate sensor replacement the first step. That helps keep the vehicle usable, reduce downtime, and remove the active warning while the original hardware remains installed.

What is OBD module

Encode your Sprinter with hand-held module to fix DEF issues forever

We have developed the module, looks like a simple OBD plug.
It can program ECU with maximum ease for everyone!

Universal solution

No Downtime

Ready To Go!

Easy To Use

Installing our module is as easy as switching on a kettle: just plug it in and wait for the download to finish.

No special knowledge required!

Best Solution

2026

Save Money

You may be facing a situation when the movement of your car is restricted or blocked, and you'll have to call a tow truck and go to the service. Any of our modules cost less than potential expenses for repair and a tow truck in such situation.

No Nerves

As it usually happens, a problem can arise at the most inconvenient moment: before a trip, during delivery of an order, etc. Instead of waiting until you encounter a problem, it's better to prevent it.

Easy Installation

The module is plugged into the OBD diagnostic port. The software is installed directly to the ECU. You don't require any tools, laptop or additional wires etc. Full plug-and-play solution.

Unlimited Use

You will receive our hand-held module. With it, you will be able to activate and deactivate selective catalytic reduction, EGR, DPF, and Swirl flaps when necessary. The device stays with you, there's no requirement to return it.

Saves warranty

The module stores several encodings, one of which is the Factory ECU map. At any time you can repeat the module installation process to activate/deactivate selective catalytic reduction, EGR, Flaps. This will help keep your dealer warranty and pass the emissions test.

Quality product

We offer a 1-year warranty on the module and will send a free replacement if it stops working.

24/7 Support

You will receive support from our expert in the shortest possible time, even on weekends.

Check out our benefits!

Installation takes just 3 MINS

Plug in the tool to the OBD diagnostic

There is a diagnostic connector in every car and access to it is simple and convenient. You simply have to insert our module into this slot.

CONFIRM SETTINGS ON THE COMAND SCREEN

The screen will allow you to select one of several scripts. Use the <> buttons to switch between them and the * button to confirm the selection.

Wait to be loaded

After selecting the script, the installation process will start. It takes from a few seconds to 10 minutes depending on the script. Just follow the instructions on the screen.

KEEP DRIVING WITHOUT LIMITS

When the installation is complete, remove the module, start the engine and make sure there are no more errors.

EASY SETUP WITH ALL MEDIA SYSTEMS

Watch these video instructions for installing the module and see how easy it is!

WE OFFER 3 SOLUTIONS

Our module will solve the problem of your vehicle being idle or spending extra money on repairs and finding a qualified mechanic.
Choose the right solution and install it yourself in a few minutes!

SCR ADBLUE / DEF DELETE

SCR total delete – no longer necessary to repair the SCR system and refill the AdBlue fluid

Whats include?

Completely remove Check Engine error

Completely remove 0 Remaining Starts error

Completely remove Starts idle error

Completely remove Check AdBlue error

Ability to roll back to factory settings

Maintains the dealer warranty

Easy pass emissions test ability

699

one-time payment

Off-road use only - about usage

PACKAGE DEAL

We suggest deleting all of the following components together (SCR, EGR, Flaps and DPF) as all of these elements work together as one system

Whats include?

Completely disables SCR (DEF) system on equipped vehicles

Completely disables EGR valve

Completely disables Swirl Flaps in the intake manifold

Optionally disables Diesel Particulate Filter

Ability to roll back to factory settings

Maintains the dealer warranty

Easy pass emissions test ability

ECU Tune Stage 1

999

1299

one-time payment

Off-road use only - about usage

ADBLUE (DEF) COUNTER RESET

Temporary solution – start the engine and drive to workshop without limitations but the SCR still needs to be repaired

Whats include?

SCR system continues to work

Ability to reset engine starts counter as many times as needed

Absolutely legal

Maintains the dealer warranty

459

one-time payment

What you'll run into without our module

You might not see them coming, but additional issues are often part of the package. It's the heads-up every customer needs.

Dealers delay

Waiting on car parts from a dealer? Brace for delays. Parts often aren't in stock, and delivery dates can shift, leaving you hanging. Dozen of surprises.

Wasting money

Repair expenses hit hard. High costs for parts and labor, plus dealer markups, and downtime mean losing more money. It's a major financial issue for truck owners.

Repair downtime

Bracing for repairs? Parts and labor are pricey, and there's always a chance of finding more issues, especially with the exhaust system.

Why better choose package deal

Just a quick heads-up on the headaches our solutions will save you from. Through years of experience, we've nailed down our customers' top issues and crafted the perfect fix for each. A package deal – it's an all-in-one solution.

Exhaust Gas Recirculation or EGR

Soot builds up on the valve, which can interfere with its operation and cause it to fail. Repairs are expensive and difficult. And most often the repair period takes a long time.

AVERAGE COST

How much you'll save

2000

Selective Catalytic Reduction or SCR

The SCR system consists of a large number of components that can fail. The most expensive breakdown is the DEF level sensor in the tank, as it will require replacing the tank entirely.

AVERAGE COST

How much you'll save

3000

Swirl Flaps in the Intake Manifold

Also, soot builds up in the intake manifold, which will interfere with the operation of the flaps. In this case, the entire exhaust manifold will have to be replaced, which is very expensive.

AVERAGE COST

How much you'll save

3500

Diesel Particulate Filter or DPF

Remove the DPF when it is clogged and only if you don't want to buy a new one, because it is very expensive. In that case we could add coding additionally so you can remove the DPF when the time comes.

AVERAGE COST

How much you'll save

5000

Tons of issues out there, but we've got one solid fix ready to go!

Get some additional features for your solution!

ADDITIONAL OPTION ECU TUNE STAGE 1

We install extra firmware to cut fuel use and save you 10% on gas. Pretty cool, right?

Dyno & Track tested performance results:

Engine: OM651 2,1L. Gain: +30 HP, +44 ft-lb
Engine: OM642 3,0L. Gain: +40HP, +49 ft-lb

ALREADY INCLUDED IN THE PACKAGE DEAL

SEPARATE CODING OF DPF DELETE OPTION

With this coding, you’ll have the option to remove the DPF from the system.

We advise only removing it if it's fully clogged and replacement or removal is required. Removing it early has no real benefit, so it’s best to wait until it’s truly necessary.

200

Reviews from our clients

Check out the experiences of clients who have successfully solved their problem with our module.

Swipe left to see more

The updated code seems to be working. I was able to run it for shot trip and I did not get any egr related codes. I would like to proceed with our other sprinter. Same tune, DEF delete, egr delete, and performance.

Rate

Vishal P, US

2017 Sprinter City • Mar, 7, 2024

I don't usually write reviews, but okay. This is the best way to delete AdBlue for your car. Made me love my car again. All the information that is advertised on the website and discussed before the payment was true.

Rate

Jeff Morris, US

2018 Sprinter 319 • Feb, 6, 2024

This is an absolute fantastic product. Instead of eating to the nearest Mercy 200mi specialists, you just plug in this device and it's done in few minutes and the best thing is that you can get it back to original map in minutess.

Rate

Dave R.A., CA

2011 Sprinter 2500 • Mar, 23, 2024

The code is gone! Almost finished running the delete now. Once again, I'm very pleased with how easy this has been as well as your service! Thank you so much.

Rate

Johnatan, US

2012 GL350 • Jan, 31, 2024

Just letting you know that I received the package and installed it on one of my vans already. Everything seems to be working great. Thank you again.

Rate

Gabe, US

2014 E250 Bluetec • Mar, 18, 2024

Thanks again great customer service and tech-support! So far everything is working great. I drove it on the freeway for about 40 minutes.

Rate

Chad S, CA

2020 Sprinter 4x4 • Apr, 2, 2024

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Resolve your issue easily and fast, no matter your location!

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We ship orders as quickly as possible. Most orders are dispatched the next business day, usually in the morning.

Delivery Terms