Sounds like a Hoover!?!?!
Earlier my 156 bottomed out on a damaged speed bump - made quite a bang. It's now making a sound like a Hoover (sucking/whining sound) which goes up and down with the revs. Can hear it more from inside the car than outside - bizarrely. Now the speedo has become intermittent too! Needle drops to 0 on braking and randomly shoots back to speed again. While it's at 0 the trip meter doesn't clock up any miles. Could these things be related? Where does the speedo cable go (or is it a sensor?) Could I have damaged it?
156 2.0 TS 1999 (and no, it hasn't been lowered)