Have Webasto Thermo TOP 5 automatic heater. I wan't to start it manually either by button or GSM. Car dealer said: just add GSM module and thats it. Some spealist said because of automatic function =works only while engine is running it needs more modifications , water pumps and so on= costs more than putting different type of heater. Does somebody have any experience.

2006 model, you can switch on with BAS remote FBHIC.

https://secure.bellautoservices.co.uk/stor...activated/ Bodsys Brake Bible
Software Updates Contact me
RRS Timed Heat/Remote kits - Contact me
BAS Engine Re-maps/ EGR Blank EuIII and EuIV
Clock On The Dash/ SNOTM /3Flash / BT Update /Service Reset/Error Codes read\ Gearbox Reset
See it HERE

Call me stupid , but what are BAS and FBHIC ?

Oh hi stupid....

Click on the link and it will take you to Bell Auto Services website, where you can buy a Fuel Burning Heater Intelligent Controller.  Bodsys Brake Bible
Software Updates Contact me
RRS Timed Heat/Remote kits - Contact me
BAS Engine Re-maps/ EGR Blank EuIII and EuIV
Clock On The Dash/ SNOTM /3Flash / BT Update /Service Reset/Error Codes read\ Gearbox Reset
See it HERE

Thanks, i send them a message. Im not sure is this a solution, because it is said there is needed mechanical changes additional to electrics.

There are no mechanical changes needed to pre-heat the coolant with the BAS controller. Heating the cabin itself is another matter, if that's what you meant (?), but with the coolant already warm, you can get heat pretty quickly.  Visiting from DISCO3.CO.UK
2006 Discovery 3 TDV6 Auto HSE Zambezi Silver