thanks Chris and everyone else who replied. I,m taking it back to dealer tomorrow, the guy seems ok to me and had already offered to sort it out, well i hope that he means hes gonna pay for whatever the problem is. I paid 1500 for it, 98 reg 123k miles and diesel, it is the best one by far i've seen and sounds very sweet so i have no plans to get or try to get refund. I must say that i cant hear the hissing noise now, but still hard to brake suffiently, and still no go for emergency stops. I really hope its the vac hose. And according to haynes , pumping brake then whilst keeping foot on brake turn engine on and i do feel the pedal go down slightly( not to far down), so that seems ok. Anyway, back to electrics, i just used it for work, only round the corner, when going home it was all frozen up so i put on the window heater and that also turns on dash lights, and when i was reversing the reverse light didnt work unless i turned the window heater button off. I guess those problems are common and hope i will learn how to deal with them, ( with a little help from you all). Well once again i wish to thank you for the replies, any more will be great, and i hope one day i too can reply and give advise to someone.