Yeah do they all have one??
just the dozel ones, the cdt's. and not every one, it takes a bit of finding one and as in my case they arent guaranteed to work but i got a petrol one off ebay for 20 quid with a relatively new burner insert (pic 7&8 notice the state of the one with burnt wires) but dead (i might have killed it) pcb.
as far as i can tell the only difference between petrol and diesel is the pcb programming. so if you aquired a couple you most likely would be able to exchange pcb's
now the main problem, apart from the pcb, seems to be the glow pin and gause pic 6 (the pin is the rectangular black bit, the gause is the gold coloured bit) but again these can be easily test and the chances of getting two with the same problem are gonna be small. in anycase the burner unit is quite cheap on german ebay.
the easiest method to get one running is a simple switch. all you need is +ve -ve and another wire for the switch. a cheapo remote control thats commonly used for electric gates is available on fleebay for around 2.99 + post.
you do need the fuel pump, located near the back wheel on the 75, the water pump should be attached to the unit (i detached mine for easier plumbing) and a fuel tank (this can be the water exp. tank from a nissan micra, the bubble one or a tank from a strimmer or plumbed into the doozel supply/return)
i have the software and cable, but any simple k-line/ibus interface can be used. a vag-com 3 off fleebay with wires to pins 16 = +ve, 5= -ve and pin 7 to pin 2 on the heater. software i have or can be gotten free.
the good bit is that all the basic stuff could set you back around 80 quid!!!
the bad bit is the ferking about finding em and uncertainty as i have never seen or used one, let alone fitted one, before i had the crazy idea to put one on mine!!!
there are lots of cars that have the webasto, audi, bmw, vw, rover, seat, ford galaxy, merc and some landrover models.
vauxhall have the eberspacher located behind the front drivers side bumper, same principal different device.
heres one off a gaylander:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=190360699536&ssPageName=ADME:B:WNARL:GB:1123
here is where it is on the 75:
and here is the wiring for it:
and heres how a new one looks:
and here's a photo of mr tumble ****ing a classic, dont know why i felt the need to post it, maybe just to prove to another forum member that rude pics are allowed on photobucket:
http://i278.photobucket.com/albums/kk90/gavbriggs/****acar.jpg