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 W204 EGR SYSTEM 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!

Not every recurring dashboard fault means the hardware must come off the car right away. On this page, we focus on EGR W204 and explain how our handheld solution clears stored warning logic on the Mercedes W204 so the vehicle can stay in use without immediate valve replacement. For many Mercedes-Benz owners, this is the practical route when a CDI warning remains active and the Mercedes-Benz car still needs to stay on the road.

What this page covers

Our company supplies one direct tool for the Mercedes C-Class W204 when the Exhaust Gas Recirculation path keeps a fault active. This page is about the Mercedes-Benz C Class W204 EGR valve topic only. It is not a general auto catalog, not a page for mixed offers, and not a store category for unrelated parts. The goal is practical: remove the stored restriction, keep the original part in place, and help the owner avoid downtime. In many Mercedes-Benz CDI cases, the stored fault remains even after restart, so Mercedes-Benz fitment and CDI matching matter from the start.

In search, owners often use phrases such as Valve Mercedes-Benz, Mercedes-Benz EGR valve, recirculation valve for Mercedes, valve replacement, or Mercedes-Benz W204 EGR change-over valve replacement. Those phrases point to one technical issue: the W204 EGR control path remains active even after restart. For a CDI owner, the most important point is simple: keep the Mercedes-Benz vehicle working without forcing immediate hardware removal.

How owners usually describe the fault

Most users report a stored EGR fault, unstable idle, or reduced response on a CDI model. In many CDI cases, the warning is tied to the valve body, electric control, vacuum behavior, or a related sensor reading. Some owners also search for information about timing chain, Diesel Particulate Filter, filter warnings, E-Class overlap, DE-market listings, or other categories when they try to find the right page. Here, we keep the content narrow and focused on the Mercedes W204 EGR path only. This is why Mercedes-Benz owners with a CDI model often compare one Mercedes-Benz fault description to another before they decide what to do next.

Focused on Mercedes C-Class W204 EGR valve faults
Relevant when the original valve part remains installed
Made for owners who want to keep the vehicle on the road

What this product does

This product connects through OBD and applies the required script to clear the stored dashboard restriction. It does not require immediate hardware removal. That matters when the owner wants a direct answer instead of ordering another part too early. For many W204 CDI cases, that is the top priority. A Mercedes-Benz CDI car can keep the same stored warning for a long time, so the correct Mercedes-Benz tool helps avoid repeated downtime.

We do not use this page to sell unrelated accessories, body parts, or broad category items. We recommend this solution when the fault clearly belongs to the Mercedes-Benz EGR valve path and the owner needs a direct fix for the stored warning. We do not sell mixed products from another manufacturer on this page. We keep the page limited to one Mercedes-Benz topic and one CDI warning path.

Before ordering

To prepare the correct setup, we may ask for the exact model year, engine type, and dashboard text. That helps us match the right technical path for the W204, confirm whether the issue belongs to the valve or sensor side, and keep the page intent clear. For owners of the Mercedes-Benz C-Class W204, this is the cleanest way to handle a stored EGR fault without immediate valve replacement. It also helps when the Mercedes-Benz owner needs the correct CDI setup for the exact CDI model and wants the Mercedes-Benz vehicle back in normal use without delay.

Question by Dylan • Published on April 20, 2026

How do I clear an EGR warning on a Mercedes W204?

My Mercedes W204 keeps showing an EGR fault and I do not want to start replacing the valve right away if the car still needs to be used every day. Is there a proper way to clear the stored dashboard warning and keep driving while the original EGR hardware stays in place for now?

Answer by OBDtune Team

✅ Price: from $459
✅ Compatibility: Mercedes Vehicles All Types
✅ Worldwide Delivery

For Mercedes W204 EGR fault cases, our handheld OBD module is often the most practical solution because it clears the stored dashboard restriction through the EGR control path without making immediate valve replacement the first step. That helps keep the vehicle usable, reduce downtime, and restore normal operation 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!

Delivery Information

We offer worldwide shipping through our partnerships with FedEx and DHL Express, ensuring your package is dispatched swiftly and reaches you as quickly as possible.

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

Delivery Terms