Renntech

This W140 Mercedes S-Class restomod is far more than a powerful motor in a luxurious shell

The tuner suggests that this is the most powerful AMG GT Black Series in the world

Ever wondered what 575 HP would feel like in a Mercedes R129 SL?

The power kits for the new A45 S will be ready in a few months, but a 468 HP upgrade will be available from mid-January

A simple (but not cheap) ECU upgrade has enabled this GT 63 S to set a new record at the drag strip

The Dawn and Wraith get an ECU remap and a lowering module that works with the standard air suspension

After being subjected heavy tuning, this hyper estate has become quicker than some current supercars

The hardcore German supercar now has 810 horsepower and 1,000 pound-feet of torque available on tap

The tuned GT R is no match for the Chiron, but just how big of a difference is there between those two?

The upgraded GT R ran the course 7 seconds quicker than the stock model – but the tuner thinks it can do better

This tuned second-gen CLS shows bystanders at a car meet how a V8 should sound

The mods include not just a software tune, but a turbo upgrade too

Besides the extra muscle, Renntech’s tuned Mercedes-AMG GT R has some bodywork upgrades, too

This drop-top Geländewagen listed for sale was privately imported to the United States and supercharged by RennTech

Compared to the S63 and S65 versions of the car, the Mercedes-Benz

Back in the early 2000’s, if you couldn’t afford an SLR, the