gerußt has been busy, but after some one hundred kilometers seemed then the car even before something rougher and I have used the Diesel Purge (PUR).
in combination with ner subsequent engine flush and the diesel system rinse (PUR!) but recommended for old cars. To celebrate the end oil change (oil and diesel filter naturally after mitwechseln)
individually I would, however, it is not easy to apply so. therefore only 3 stars