More and more manufacturers are announcing voluntary recalls on affected vehicles following German government investigation
Jim Holder
28 April 2016

Mercedes-Benz has become the latest manufacturer to offer voluntary recalls for cars in the UK, following a German government investigation in response to the ongoing emissions scandal.

No more details have been given surrounding how the voluntary recall will be carried out or the number of cars involved, but the affected vehicles are expected to be some diesel-powered A-Class, B-Class and V-Class models, after the investigation found irregularities in their - and many other manufacturers' - emissions systems.

Yesterday, Suzuki announced it would offer a similar voluntary recall, with some of the car maker's Fiat-engined models falling short of emissions requirements during the same investigation. Suzuki emphasised that the only models in its range to be affected use engines supplied by Fiat, and that the service action it is offering to rectify them is entirely voluntary.

The German investigation found that AudiMercedes, Opel, Porsche and Volkswagen failed to meet expectations, with all five voluntarily recalling more than 630,000 diesel-powered vehicles in their home market - but several other car makers were also named in the investigation. Audi and Vauxhall/Opel were the first to confirm that they will make the voluntary updates on every affected car in Europe.

During real-world testing, German government investigators discovered what they deemed excessive NOx emissions levels, chiefly as a result of emissions reductions systems only working at certain temperature levels.

The full list of cars deemed by the German government to have excessive emissions isAlfa Romeo Giulietta 2.0; Audi A6 V6 3.0; Chevrolet Cruze 2.0; Dacia Sandero 1.5; Fiat Ducato 3.0Hyundai ix35 2.0; Hyundai i20 1.1; Jaguar XE 2.0; Jeep Cherokee 2.0; Land Rover Range Rover 3.0; Mercedes-Benz V250 Bluetec 2.0; Nissan Navara 2.5; Opel Insignia 2.0; Opel Zafira 1.6; Porsche Macan 3.0 V6; Renault Kadjar 1.5; Renault Kadjar 1.6; Suzuki Vitara 1.6; Volkswagen Amarok 2.0 and Volkswagen Crafter 2.0.

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The announcement follows on from the UK government’s similar investigation, which was presented yesterday, finding levels of NOx emissions were up to six times the prescribed legal limit in lab tests. However, the Department for Transport did not immediately back up its findings by calling for a voluntary recall.

However, following the German government's action, Secretary of State for Transport Patrick McLoughlin said: “I am pleased to hear today’s announcement from Germany that Mercedes, Opel, Volkswagen, Audi and Porsche are able to offer consumers changes to their cars which will reduce emissions. I will be seeking urgent clarification from these manufacturers that they will be offering the same fix to car owners in the UK.”

It is not clear if McLoughlin will also call on the other car makers listed by the German government as having excessive emissions in the real world to take action.

Vauxhall/Opel had already announced in March that it had instigated plans to improve NOx emissions of SCR (Selective Catalytic Reduction) diesel engines.

Meanwhile, Audi announced it will go beyond the formal request for action in Germany and recall 65,700 cars with six-cylinder diesel engines throughout Europe. "Cars will be tooled up with a overhauled software in a voluntary service action," the firm said. "The technology is used in EU5 and EU6 models of production-series Q5, A6 and A8 with a manual gearbox."

The following cars have voluntarily been recalled already in Germany: Audi Q5 (22,000 cars); Audi A6 (29,000); Audi A8 (15,000); Opel Zafira (58,000), Opel Insignia (31,000); Opel Cascada (1000); Mercedes A-Class and B-Class (211,000); Mercedes V-Class (36,000); Porsche Macan (32,000); VW Amarok (70,000); VW Crafter (124,000).

It has not been alleged that any of the manufacturers have broken any legal requirements for emissions. However, the German and UK governments have now asked that the real-world emissions levels, which are outside of European regulatory requirements, should be investigated and improvements to the emissions reductions systems be made.

It is understood the German investigation - as with the UK government's - uncovered concerns regarding the operating temperatures of emissions-reducing recirculation systems and particulate filters. The tests showed that manufacturers shut down the filter systems at different temperatures in order to prolong the life of the parts involved.

It has been reported that Mercedes diesels shut down the EGC after treatment systems at 10deg C while Opel’s is shut down at 17deg. This means that, while the systems would run at full effectiveness in the official laboratory emissions tests, they would regularly not be effective in everyday use. 

In response to the announcement, Daimler, owner of Mercedes, said the test results do "not indicate the use of non-permissible software". It added there were technical reasons for deviations from the certified values and that it welcomed the EU's forthcoming introduction of Real Driving Emissions (RDE) test methods.

Until now, Mercedes had only said it would offer German customers of the A-Class, B-Class and V-Class a voluntary recall. The entry-level engines affected also include the 1.5 dCi Mercedes-sourced Renault engine, which is understood to be affected on the Kadjar model.

A Nissan statement read: "We are aware of the KBA report and its findings relating to the vehicles they tested in the German market. We have no plans at this time to recall any Nissan vehicles mentioned in the report."

A Hyundai statement read: "All Hyundai vehicles tested comply in full with conditions stipulated by European certification regulations. The company is committed to a policy of continuous improvement and will continue to reduce emissions and develop environmentally friendly technologies" but did not specify if remedial work would be done.

The news follows on from Mitsubishi admitting that it had cheated on fuel economy tests in Japan, a raid related to emissions on the offices of Peugeot and a US investigation into diesel emissions at Mercedes.

Last week, VW revealed that it had reached an agreement with a US judge to buy back affected cars in the US and offer owners compensation.

Join the debate


22 April 2016
Ban all diesel car sales! On a more serious note this sounds seriously expensive to fix. "Mercedes diesels shut down the EGC after treatment systems at 10 degrees centigrade" that's pretty much half the year in the UK

22 April 2016
Why don't they scrap the lab tests and run tests on vehicles at the legal motorway speed, that way motorists will be better informed as to how they might reasonably expect a vehicle to perform. Obviously it will return lower mpg in town, fully loaded up or driven like a twat. Lets get real.

22 April 2016
Because the conditions have to be EXACTLY the same when each vehicle is tested, something thats impossible to guarantee. What should happen is that the EU should simply make their diesel regs the same as the tough California regs, the EU should do the testing NOT the manufacturers and the MOT should include a proper emissions test for diesels like it does for petrols, not just a smoke test. SCR and DPFs should have been mandated on all diesel vehicles 10 years ago, all this is the fault of the EU being slack, theres nothing wrong with diesels at all, as long as the have emissions regs that are as tough as those for petrols.

22 April 2016
RIP diesel

22 April 2016
If these systems are designed to shut down the EGC system outside of lab temperatures then how is this anything other than a cheat device? These manufacturers must know the implications of configuring their systems to behave in this way and knowing that it will maximise their performance in the lab. What am I missing? I need one of the maniacal VW haters to enlighten me...

22 April 2016
I confess up front that I have never liked diesel engines in cars. In my opinion they are noisy and smelly with few redeeming features. I stuck to my guns while many of my friends smugly accused me of being less than environmentally friendly, a luddite and worse. When the VW scandal broke i laughed privately and chose to say nothing as my friends all complained and let loose with endless vitriol about VW and others claiming that they had been conned, hoodwinked and so on.

I mean, honestly, really? Have you ever seen the clouds of oily black smoke that pour out of buses, taxis and old white vans? At which point did the gullible diesel buyers ever think that black oily fuel could be persuaded to become nice and environmentally friendly?

22 April 2016
Renault Kadjar 1.5 and 1.6tdi but no mention of Nissan Cashcow 1.5 and 1.6tdi? Strange state of affairs given that it's the same engine.

22 April 2016
I've always had my suspicions about the other German manufacturers , they are all very aware of each others technologies, generally if one gets a new technology then the others all follow so it always struck me as odd that it was only VW that was messing about.

22 April 2016
Part of the reason for VWs emissions cheats is that it was trying to get out of paying Mercedes royalties for using its adblue system.

23 April 2016
typos1 wrote:

Part of the reason for VWs emissions cheats is that it was trying to get out of paying Mercedes royalties for using its adblue system.

VW have previous form here. Originally, instead of using the common rail system they used their own arrangement but were forced to change to common rail because, wait for it, their system could not meet emission standards.

(Meanwhile, all the reactionaries who "don't hold" with diesel are having a field day!)


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