Controls and features -> Service Interval Display for Your BMW Z3 SUV First Generation (1995-2002)

Coolant temperature gauge  
Service Interval Display 69n  
Between the blue and red zones  
Normal operating range. It is not  
unusual for the needle to rise as far as  
the edge of the red zone in response to  
high outside temperatures or severe  
operating conditions.  
Checking coolant level, refer to  
page 125.  
Blue  
Green lamps  
The engine is still cold. Drive at  
moderate engine and vehicle speeds.  
The number of illuminated lamps  
decreases as the time for your next  
maintenance visit approaches.  
Red  
Yellow lamp  
When you switch on the ignition, the  
warning lamp comes on briefly to  
confirm that the system is operational.  
This field appears together with  
OILSERVICE or INSPECTION.  
Comes on while driving: the engine is  
overheated. Switch off the engine  
immediately and allow it to cool down.  
This alerts you that maintenance is due.  
Please arrange for an appointment with  
your BMW center.  
Red lamp  
Maintenance is overdue.