Hi, We have inherited a Mercedes 450 SE Auto after our uncle died. We are trying to sell the car to pay for the funeral expenses. After leaving it parked outside with the handbrake on the drivers side handbrake is now locked on. Despite plenty of penetrating oil, rubber mallet and rocking backwards and forwards it refuses to unstick. Does anyone have any suggestions. We have looked at removing the disk but this seems to be impossible. Short of trying to dismantle the entire handbrake we can't think of anything else. Any help would be appreciated.