You could be owed thousands if you purchased or leased a diesel Mercedes vehicle between 2009 and 2020.
*Our partner law firms work on a no-win, no-fee basis. You’ll only pay if your claim succeeds. Fees may apply if you cancel after the cooling-off period or breach your agreement. All terms are clearly explained before joining. Join the Claim isn’t a law firm, we help connect you with a regulated UK firm running this group action.
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Overview
Mercedes-Benz has been accused of emissions cheating. Lawyers believe the company fitted thousands of its diesel vehicles with so-called “defeat devices”. These devices cheated emissions tests to make vehicles appear more environmentally friendly than they were.
People who bought or leased the affected Mercedes cars and vans were misled about their efficiency and environmental friendliness. They may have suffered inflated fuel and maintenance costs, and the affected vehicles are likely to be worth less than the drivers paid for them.
In December 2025, a 10-week-long trial against several leading car makers, including Mercedes concluded. A judgment is expected in summer 2026. The total value of the litigation is estimated at £6 billion, and this ruling could affect 1.6 million UK drivers. Are you one of them?
If you purchased, leased or financed an affected Mercedes vehicle you could have a no-win, no-fee compensation claim. Sign up as soon as possible so you don’t miss the deadline.
At a glance
Deadline
Judgement expected
Summer 2026
Previous payout
Over £2,100* per vehicle
*In similar claims against Volkswagen.
If you have purchased, leased, or financed a Mercedes diesel vehicle (manufactured between 2009 and 2020) — new or second-hand — you could be eligible to join the claim. If you have a claim, and you want to join the group action, register your interest and we’ll connect you with a regulated UK law firm. You may be entitled to compensation worth thousands per vehicle.
Answer a few quick questions to see if you could qualify to join the claim. It only takes a few minutes and helps confirm if you may be eligible.
We’ll show you which regulated UK law firm will handle your claim before any details are shared, so you can review their information and decide if you’d like to continue.
If you choose to proceed, you’ll complete your registration with the law firm. They’ll handle your claim on a no-win, no-fee basis and keep you updated every step of the way.*
December 2025
The 10-week-long trial concluded. A judgment is expected in summer 2026.
October 2025
A major trial has begun at London’s High Court. Five leading carmakers — Mercedes, Ford, Peugeot/Citroën, Renault and Nissan — are accused of cheating on emissions tests.
26 May 2025
Four ex-VW bosses are found guilty of fraud in a German court. If it’s proven that other car bosses were involved too, it potentially strengthens the case for more UK drivers to get justice.
November 2024
The High Court ruled that ‘diselgate’ claims against Mercedes would take place in the UK. The manufacturer had tried to prevent UK claims from going ahead.
March 2024
The High Court ruled that the first UK trial against Mercedes would take place in October 2025.
September 2020
The KBA recalled a further 100,000 Mercedes-Benz vehicles for being fitted with an “inadmissible shutdown device”.
September 2019
German prosecutors fined Daimler (the parent company of Mercedes-Benz) €870 million for “negligent violation” over the sale of various diesel models linked to this scandal.
June 2018
Mercedes-Benz recalled nearly 775,000 diesel cars and fitted them with new emissions software.
July 2017
News broke that Mercedes-Benz had also manipulated more than one million cars sold in Europe and the US.
2015
The global ‘dieselgate’ scandal started when US investigators discovered Volkswagen Group had been selling cars with illegal emissions-cheating software. British researchers then found that other car manufacturers were emitting toxic fumes way above the legal limits.
We’ll provide more updates on the Mercedes emissions scandal as they occur.
Find out if you could join a no-win, no-fee Mercedes emissions claim. It will only take a few minutes and there’s no obligation to proceed.
Mercedes faces legal action for allegedly fitting several of its diesel models with emissions-reducing software. As well as the potential impact on the environment and human health, this scandal resulted in significant financial losses to owners of these vehicles. Drivers of affected Mercedes vehicles may have experienced higher fuel bills and maintenance costs than was promised. The cars are likely to be worth less than drivers paid for them. We believe these drivers deserve compensation for the possible harm and injustice experienced
The affected Mercedes vehicles were first registered between 2009 and 2020. However, the wider ‘dieselgate’ scandal involves many more car manufacturers.
Named ‘dieselgate,’ numerous diesel cars and vans are entangled in this environmental scandal, and yours might be among them.
Volkswagen (VW) has already agreed to a £193 million settlement for affected vehicles, setting a precedent that your vehicle manufacturer could soon follow. The list of implicated vehicle manufacturers is extensive. These vehicles were deceptively marketed as environmentally friendly, boasting lower nitrogen oxide (NOx) emissions. However, the reality was quite the opposite.
Defeat devices artificially lowered emissions during testing to meet EU regulations. However, when these same vehicles were driven on the road, they proved to emit significantly higher levels of nitrogen oxide (NOx) gases compared to the reported test conditions. This not only posed a threat to the environment but also jeopardised public health.
Lawyers are actively investigating these claims on behalf of individuals, just like you, who have owned or leased one of the affected diesel vehicles. The potential compensation for this claim could be substantial, likely amounting to thousands of pounds. If you purchased or leased a diesel vehicle and suspect you may have been impacted, we strongly encourage you to join the claim today.
If you have owned or leased an affected diesel vehicle first registered between 2008 and 2020, you could have a NO-WIN, NO- FEE compensation claim. Our simple eligibility checker provides instant clarity. Answer a few straightforward questions, and you’ll know if you qualify for a Mercedes emissions group action claim.
Yes. If you bought a used diesel car you may still be eligible for compensation. Try our simple eligibility checker to see if you have a claim.
Yes, if you sold an affected vehicle, you may still be able to join a group action. Try our simple eligibility checker to see if you have a claim.
We cannot say how much compensation you might get if you win your case. Each claim is based on its merits and your solicitor will work to get the money owed to you.
In a similar case against Volkswagen, 91,000 claimants were paid £193 million. The average payout was over £2,100.
In the UK, if a group of people have experienced loss, or otherwise been harmed by an organisation’s law breaking, they can come together to fight for justice. Levelling the playing field when standing up to big businesses, group actions prove there is strength in numbers. At Join the Claim, we bring consumers and law firms together to ensure these group actions are as powerful as possible.
We won’t charge you a single penny. And we ensure any law firms we connect you with operate on a no-win-no-fee basis.
However, fees may apply if you cancel after the cooling-off period or breach your agreement.
If you win, the law firm will either take its fees from your compensation payment or recover them from the defendants.
All terms are clearly explained before joining.
A no win, no fee agreement means you don’t pay your solicitor’s legal fees if your claim is unsuccessful. This makes it easier and more affordable to take part in group litigation. However, T&Cs apply.
Want the full picture, including what to check before signing? Read our complete guide to no win, no fee agreements here.
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We connect consumers with their legal dream teams to ensure they get the compensation and support they deserve.
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