A diesel particulate filter (DPF) is used in the exhaust system of some diesel models to remove soot from the exhaust gases. Models with a diesel particulate filter have a PR number 7GG, 7MB or 7MG on the vehicle data sticker. The filter is periodically cleaned by burning off the soot accumulated in it (regeneration process), which is accompanied by significant heating of the filter. The regeneration process occurs automatically. However, in some cases it may be necessary to provide conditions under which filter regeneration occurs. To indicate the need to clean the filter, there is a corresponding K/L in the instrument cluster (see Section 13). A detailed description of the particulate filter is given in Parts B Chapters 4.
When the engine is running, exhaust system components can reach very high temperatures - try not to touch hot components and do not park the car on areas covered with flammable materials (fallen leaves, dry grass, garbage, etc.).
Make sure the engine settings and adjustments are correct. Deviations in the setting of operating parameters of the ignition, fuel injection and engine management systems can lead to a dangerously rich air-fuel mixture and overheating of the catalytic converter. If misfires occur, the vehicle should not be used until the cause of the malfunction is eliminated.
Unburned fuel from the combustion chamber during misfires enters the converter, where it can easily ignite. For the same reason, you should avoid starting the engine by towing or pushing; it is better to use an auxiliary battery. Do not crank the engine for a long time, do not attempt to start the engine with the spark plug supply disconnected.
Monitor fuel consumption, try not to allow it to run out completely, which is usually associated with misfires (see previous paragraph).
(Text taken from this website: SKODABOOK.RU)