I am looking at a 1988 735i. The owner says the only thing wrong with it is the dash lights goes out sometimes (intermittent). I am wondering if this is something that happens often in these cars and if any one has any suggestions as to what it might be? My worst fear is that the entire dash instruments and all go out when this happens and I wouldnt find out until after I bought the car. I asked the guy if the OD goes out as well when this happens and he paused and said he didnt know.