With my 406 2.2 HDI FAP Break all four glow plugs have burned through completely. Km stand 202,000. I discovered this because the error message “Permanent error:Pre-Nachglührelais circuit, relay blocked in the error memory. Start was however at 5°C still totally inconspicuous. The error message did not come because the relay hangs, but because because of the missing load of the output was always on 12V. I found that out already. But to see what actually happens there a 5W lamp The incandescent times are quite long. At 7…10°C incl. afterglow time approx. 3 minutes. Even after only 5min turn off and cooling water temp. 80…90° is still annealed about 3s. In the Haynes Repair Manual I found the following: Preglowing at cooling water temp less than 20°C at Engin rpm greater than 70 rpm over 0.2s (if engine is not started after 10s) -30°C 20s -10°C 5s 0°C 0.5s 18°C 0s Nac hglow – at cooling water temperature less than 20°C – injection quantity under a certain amount – engine speed < 2000 rpm (measured approx. 1800 rpm) -30°C 3min -10°C 3min 0°C 1min 18°C 30s 40°C 0s According to this, the incandescent times would be too long. But can this be related to the 2.0 HDI. is not described in more detail. My question now: Does anyone know the specified incandescent times at 2.2 HDI?