I would avoid the 1999 model. The front brakes were improved in 2000 to equal the ML55. Also make sure if you get an early 2000 model the Harmonic Balancer is not part #112 035 00 00. If it is and you buy it, have it replaced before it fails and costs big $$$$. Also make sure the aux fans in front of radiator have the new wiring harness and fuse #44 upgrade.