Warm-up program

After every engine start below a certain engine temperature, the warm-up program is started. In the warm-up program, the automatic transmission remains in the performance-oriented characteristic map XE or XS until a certain temperature is reached. The gears are only shifted at higher engine speeds. This enables the engine and catalytic converter to reach their operating temperature more quickly.

Up to a certain transmission oil temperature, the converter lockup clutch is not regulated or closed.