Older models of the Mercedes Benz GL450 have above average reliability and the 2014 model received three and a half out of five stars for reliability by J.D. Power. US News and World Report gives this model an overall rating of eight and a half out of ten.
The interior had a quality rating of eight and three tenths out of ten, while the 2014 model's performance rating is eight and two tenths. The GL450 is powered by a V8 engine and comes standard with a seven speed automatic transmission. This model provides respectable fuel economy at 19 miles per gallon in highway driving and 14 in city.