scan gauge II
 

look at this

http://www.scangauge2.co.uk/index.html

is it worth a buy ?

OBD key (or some other OBDII bluetooth adapter // there are many options in ebay) will do the same thing when combined with a new smartphone.

http://www.obdkey.com/

If you need more details / info, I can post them

yes, but it can stay in the car all the time

That looks rather neat Alex, do you have one ?

I have a scangauge in my non csl car, they are very useful,as it just reads all the info your engine ecu can see - invaluable in a badly equipped ford:hahaha:

packaging wise its a bit tacky, and nowadays you can get some handy toys for your phone as alex says...

http://www.plxkiwi.com/kiwiwifi/software.html

"it just reads all the info your engine ecu can see"

Not quite, it just reads a very small subset of information as defined by the OBDII standard :D

I had one in a previous non CSL car also .

Was good for resetting fault codes and keeping an eye on intake temps.