Severe operating conditions mean the following:
- A - driving in a dusty area
- B - frequent trips for short distances
- C - trailer towing
- D - long engine idling
- E - driving in extremely adverse weather conditions or in areas with very low (high) temperatures
- F - driving in areas with high humidity or mountainous areas
- G - driving on roads sprinkled with salt or other corrosive substances
- H - trips on rough, muddy or sandy roads
- I - frequent braking or driving on mountain roads