My friendly garage owner showed me a Peugeot 207 diesel engine that was complete coked up after 30,000 miles. He explained that the source of the problem was taking the worst emissions from the exhaust and reintroducing them into the combustion system. Combine this with careful driving and coking is the result.
These engines need to be driven hard as someone else has stated above.
I thought all French cars had been designed to be driven as if being chased by the Les Gendarmes???
