The ban of sales of these three models was imposed in June after Mercedes vehicles were sold with a phased-out air conditioning refrigerant - which France says is in breach of European Union rules.
Since January this year many car manufacturers have agreed to switch to using a new type of air-conditioning refrigerant, R1234yf, and to phase out old R1234a refrigerant - reportedly 1000 times more potent than C02 as a global warming agent.
Mercedes and its parent company Daimler have continued to use the older refrigerant in its cars, however, citing safety concerns. The manufacturer says that results from its own crash tests show the new refrigerant has the potential to ignite.
The refrigerant's maker, Honeywell, says there is "no significant risk" of this happening.
Mercedes has had its cars re-certified to European standard in Germany and says its cars are fully legal.
"The cars were re-tested to the same standard as all other cars," said a Mercedes spokesperson "The cars do have valid EU-type approval and are legal to be registered, sold and driven."
The European Commission has officially notified the German government of its objections to Daimler continuing to use the old refrigerant - giving the company until September to comply with the new standards.
In a statement the European Commission said that "corrective measures shall be taken to bring the [non-conforming] vehicles in conformity, including the withdrawal of those non-conforming vehicles already sold on the market."
No other country has enforced a ban on new Mercedes registrations.
Daimler has said it will continue to use the old refrigerant until a 'safer' alternative becomes available. Alongside other manufacturers, the company is working on a C02-based refrigerant that it will introduce into the market before the next EU emissions deadline, which comes into force at the end of 2016.