Touareg: 2008 V6 TDI
Join Date: Jul 2010
Location: Melbourne Australia
Second Vehicle: VW 2
Thanked 138 Times in 130 Posts
Mine is exactly the same, and has always been like that. I put it down to a less than perfect vacuum chech valve on the booster.
2008 V6 TDI, with the following Retrofitted Items:
ACC, Front & Side Assist, Paddle Shift, Towbar & Trailer Module, Fiscon Bluetooth. Reversing Camera, Front Fog Lamps, Redarc TowPro Brake Controller, T1 Door Warning Lamps, T1 Under Seat Drawer, Alloy Skid Plate, 5ton Winch, Cayenne Front and Rear Sway Bars, Tuned by Oettinger, Retrofitted 6 Piston Brembo Front Brake Callipers, Sports Steering Wheel, TPMS (OEM), Dual Batteries