NOW, however, after driving the car for say half hour or less, leave it off for a few minutes or longer it will not start or struggles very very bad to start like the battery is flat. The battery is new and has been coded (not an official Audi battery but big enough to power the electrics) but it does not start when it has warmed up. If the some lights come on but the Glow plug light does not come on you have a relay 109 problem. If NO lights come on, you have a power problem so start at the battery and start checking. The earlier cars had a bad problem with the main power relay which is numbered 109 in the relay panel. The original relay was black, and the updated one is gray. Q7 MK 1 Discussion - Year 2011 - Q7 Not Starting - Strange - Hello all, I am new to this forum and this is my first Audi. I bought Q7 only last week and drove over 300 miles. All was good. today I just came home after driving 10 miles and parked the car. When I went back to restart the car, it did not start again. It Originally Posted by Mesquite77. OBDII eleven pro can do it, go to adaptations - battery, change serial no. VCDS can do it. If by your "OBD11" = OBDeleven standard, then you may need to manually do the coding? Any other OBDII likely cannot, maybe Carista can? Yes, sorry, I do have OBD11 Pro. PPP. I got a Q7, 2008, Diesel, no pressure to start, we visually see there is slightly moving of fuel out from the High pressure pump when cranking. 1- There are some fault store like glow plug and fuel regulator. 2- Replaced the new High pressure pump and the car start as normal and power correctly. After a day drive and park for an hour then Getting Started - Prepare for the repair. 2. Open the Hood - How to pop the hood and prop it open. 3. Jump Points - Locate the positive terminal and the ground. 4. Jump Procedure - Correctly hook up the jumper cables and jump. 5. After the Jump - Tips to follow after jumping the dead battery. jakematic. First thing I would do is recode BMM so that it knows a new battery has been installed. If it's not a serialized battery, choose one of similar spec and increase the existing serial # by 1. Use this hidden menu at your own risk. Press and hold Car and Setup simultaneously to access hidden menu. The fob I replaced the battery in triggers the message every startup. Old battery was at 2.9V. Replacement 3.26V. Seems like the message is latched. Like I said, seems to work fine. Update: Used the secondary key for a few days and the low battery fault seems to have cleared on its own. All now well. d7OprHL.