As you stated above the air conditioning is not a reason a driver would loose control unless you have a mercades that is leaking gas and my kids and passangers are sick and passing out and so am I. this has been going on almost 3 years. Goes to dealership and then sits because they never fix it. Finally a law suit with people having same problem entered the class action suit nothing. Took the car back and they say now the toxic gas leaking out of faulty A/C units that Mercedes was sued and consumers won but now won't fix the problem. So I now have severe asthma my kids now have breathing issues and won't drive a sick car. A/C units are to be contained and hold anti-freeze that if inhaled as it is leaking out of the non contained unit is toxic, a carcinogen, same toxin used in nerve gas and it is deadly and Mercedes does not fix it or care. This has gone on for years and is a nightmare. They made a settlement but then they don't do what the judge set forth in the settlement agreement and I am not the only one;

- Germantown, MD, USA

Upon acceleration after a complete stop there are several seconds of hesitation to accelerate and loud clicking sounds that neighboring cars can hear. After doing online research, this issue is not limited to GL450. Other owners have expressed the same concern in other models: 2008 C300, 2009 C300, 2015 C300, 07 GL450, 03 GL450.

- Arlington, TX, USA