bcsdiesel

Guys I have an intermittent hum coming from right rear. I assume it's the vacuum pump or an electronic relay. It happens every 6secs and seems like it's trying to lock the doors. Any insight would be greatly appreciated.

503C43 ////AMG

usually if you have a leak the pump will turn on and off trying to regulate pressure. Do you hear a hissing sound like air escaping? Listen next to your doors when you lock them.

bcsdiesel

Thanks for the info. I figured it out. It's a leak in the seat adjustment. I really appreciate the response.