Mercedes and Audi have already announced similar recalls, which will affect more than three million diesels from the company with the three-pointed star logo and 850,000 diesels from the four-ring brand.
A committee will be set up to measure the impact of updating diesel cars on individual communities and cities, with a view to averting bans of diesel cars, the sources said.
Daimler tried to get ahead of things this week by recalling 3 million diesel vehicles in Europe for a free emissions-system adjustment. Since 2006, the carmakers have also discussed the cost of AdBlue, an exhaust emissions treatment system for diesel engines, the magazine said.
Vehicles with affected engines would receive a free software upgrade that "will further improve their emissions in real driving conditions beyond the current legal requirements", Audi added.
Three Israelis stabbed to death in West Bank settlement: army
They refused to enter, preferring to pray outside, in some cases filling the narrow alleyways of the Old City's Muslim quarter. Just hours later, three Israelis were stabbed to death in the Jewish settlement of Neve Tsuf in the Israel-occupied West Bank.
BMW now sees no reason to issue a voluntary recall for diesel cars fitted with Euro 6 compliant engines, but the firm has committed to an optional software upgrade for Euro 5 diesel cars at no cost to customers. The Stuttgart-based firm recalled some three million cars earlier this week for a software update created to reduce emissions. And, it also knows that the lower CO₂ capability of diesel will enable the automaker to meet ambitious European emissions targets.
The scandal comes as automakers wrestle with an unprecedented technology shift in the industry, with electronic cars made by Tesla or Toyota finding more buyers and German manufacturers trying to catch up with the battery-powered vehicle trend.
Mercedes-Benz and Audi have announced recalls for almost four million diesel cars across Europe in a bid to avoid fines and vehicle bans in European cities. The mayors of Paris, Madrid, Athens and Mexico City announced plans to take diesel cars and vans off their roads by 2025. Audi customers will not face any cost for the work, the company has said. Audi followed on Friday with its own recall to update the software in Euro 5 and Euro 6 engines.
"We have information that we are looking at, but I can not say more on that", he said.
With the software updates, the auto industry is able to cut nitrogen oxide pollution by about 20 percent, the sources said.