Instruction book AUDI A4
 Audi A4   Driving tips  Your Audi A4 and the environment
A new Audi A4 should be run in over a distance of 1,500 km. For the first 1,000 km the engine speed should not exceed 2/3 of the maximum permissible engine speed – do not use full throttle and do not tow a trailer or caravan. From 1,000 to 1,500 km you can gradually increase the engine rpm and road speed.
During its first few hours of running, the internal friction in the engine is greater than later on when all the moving parts have bedded down.
How the Audi A4 is driven for the first 1,500 km also influences the engine quality. After this period you should continue driving at moderate engine speeds, in particular when the engine is cold. This helps to reduce wear and tear on the engine and increases the potential mileage which can be covered by the engine.
You should also avoid driving with the engine speed too low. Change down to a lower gear when the engine no longer runs "smoothly". Excessively high engine speeds are prevented by an automatic rev limiter.

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