This function is used to perform a regeneration. The function cleans the particle filter from particles by burning them off. In certain driving conditions, the particle filter can not be cleaned automatically, e.g., in continuous city driving. Then it may be necessary to perform a regeneration to avoid clogging of the particle filter.
Exhaust temperature is very high during this procedure. Therefore, perform the regeneration outdoors, without connected exhaust hose, with open hood.