See also:

Additives
Do not use any additives in the engine oil. This could damage the engine. ...

Making adjustments in 5 mph (Canada: 10 km/h) increments
Briefly press the cruise control lever beyond the pressure point, up 1 for a higher speed or down 2 for a lower speed. The last speed stored is increased or reduced. ...

Driving, Part Two
The CL's standard Airmatic suspension is hard to fault. It can operate in either its default Comfort setting or a firmer Sport setting. Without going into technical details, I'll say that it absor ...