Volvo automatic transmission error

I have a 'Transmission requires service' message on my on board read out and an orange engine light on permanently. My trannie works very well (once warm), but reverts to limp mode (ie. manual shift and...

How do I reset my SEAT Alhambra's service light?

How do I reset my 2004 SEAT Alhambra's 'Service Now' light which appears on the computer screen?

How can I switch off my Nissan Tino's service indicator?

I drive an Nissan Tino 2005. There is a spanner on the display which states the car is due for a service. How can I turn it off?