I recently bought an '88 780 (yes, it's not a 740 or 760 but I'm hoping someone in this forum will recognize the problem I'm having). Overall it's a great car, although not as reliable probably as the 240's or 740/760's. I've fixed a few of the issues it had when I bought it - the typical melted heater blower fuse, etc.<p>The problem I'm having trouble with is that when I accelerate from a dead stop, there's a grinding/popping noise that lasts for just 1 or 2 seconds as the car starts to accelerate. It's loud enough to feel the vibrations in the seat. It seams to be coming from directly under the center console area where the emergency brake handle is. <p>I can't pinpoint precisely where it's coming from since it only happens when the car is in motion and I can't exactly strap myself to the bottom of the car while it's accelerating. Well...I could, but you know.<p>Any ideas?