2007 Mercedes Benz 350sdl 6 cyl Two Wheel Drive Automatic 65000 miles
1 month ago, had fuel system repaired under extended warranty. Upon driving, noticed strong smell of gas.
Returned to dealer, they said is was residual vapor and would air out the car. Car still has smell strong enough to give headaches. Need to change repair shop, what do I need the next shop to do to fix this? How do they test for leakage and how do I avaid getting ripped off by residual vapors again.