The car can complete the quarter-mile in 9.9 seconds at 139 mph. Renntech has a new upgrade for the Mercedes-AMG GT63 4-Door Coupe. It’s called the RIIX (arr-three-ex), and it combines the ...

Heading to the Palm Beach Barrett-Jackson auction is this 2004 custom Renntech Mercedes-Benz SL600 with ... Along with the AMG Sport Package, the SL600 has plenty of upgrades from Renntech.