whilst looking on ebay i came across this one bit pricey for you maz asked if cambelt changed and whether aux heater works - got snippy reply saying it didnt need belt changing and they had never needed the heater and after querying these and the fact it said 130bhp in bold on the listing got the following reply
maybe single switch with 2 poles?? there is a post on here dave-g ithink talking about a bad batch of these. Does car go into limp home mode when it happens ?
aux heater - well known problem, - check to see if the smoke is coming out of the little exhaust pipe under the rear passenger seat rather than the main exhaust - time to change its glow plug - some reading here