Hello municipality, my XC90 D5, Ez 12.2006, 185 Ps, 251,000 KM, automatic, makes the following problem: When starting in the cold state he smokes heavily under the engine room for about 30 seconds. If I have programmed the heater and start it, then it smokes violently for a few seconds. – Heating performance not even lukewarm. – Heating last week I had overtaken for 1,000,-€ – Heat exchanger I got today. Is installed after the holidays could then also the environmentally harmful and unpleasant smoke formation be finished? Many thanks for your tips in advance. Best regards from the Badischer, Volker