Mercedes-Benz 5G-Tronic transmission

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Manufacturer Daimler AG
Chrysler Group LLC
Production 1990–Present
Body and chassis
Class 5-speed longitudinal automatic transmission
Predecessor 722.5 & Mercedes-Benz 4G-Tronic transmission
Successor Mercedes-Benz 7G-Tronic transmission

The Mercedes-Benz 5G-Tronic (also called 722.6) is an electronically shifted 5-speed overdrive automatic transmission with torque converter lockup (typically in gears 3,4,5). It replaced the older 722.3 / 722.4 4-speed 4G-Tronic transmission and its 722.5 5-speed derivative.

Itself, it was replaced by the Mercedes Benz 7G-Tronic 722.9 transmission introduced in 2003. This turned out to be a very lengthy process stretching out over nearly a decade. Due to its high torque capacity (up to 1000 Nm) and lower cost, it was still retained for turbocharged V12 engines respectively four-cylinder applications and commercial vehicles for many years. It is still being built for niche applications (Sprinter with gasoline/CNG M111 engine, Jeep Wrangler etc.)

In Chrysler applications this transmission is identified as the New Automatic Gearbox Generation One, or NAG1.


Gear ratios[edit]

Mercedes-Benz Transmissions
Gear 1 2 3 4 5 R1 R2
5G-Tronic (W5A330/Small NAG)[1] 3.951 2.423 1.486 1.000 0.833 -3.147 -1.93
5G-Tronic (W5A580/Large NAG)[2] 3.595 2.186 1.405 1.000 0.831 -3.167 -1.926

Special operating modes[edit]

Winter Mode[edit]

Activated by a toggle switch, Winter mode sets the gearbox to start off in 2nd gear, (both in Drive and Reverse). This is designed to reduce wheelspin on icy surfaces

Speedshift (2001-)[edit]

A performance feature set for the Mercedes-Benz transmissions, which includes manual mode, active downshifting. When cornering at high speed, the transmission maintains the same gear above a certain lateral acceleration level. It can also automatically downshift before overtaking.

It was first used in 2001 Mercedes-Benz C 32 AMG.,[3] 2001 Mercedes-Benz SLK 32 AMG.[4]

AMG Speedshift (2002-)[edit]

A version with mechanical lock-up of the torque converter from first gear, steering-wheel-mounted shifter. AMG Speedshift is also used in 7G-Tronic transmission.[5]

It was first used in 2002 Mercedes-Benz E 55 AMG, S 55 AMG, C55, CL 55 AMG.[6]

AMG Speedshift R[edit]

A version used in Mercedes-Benz SLR McLaren. It includes 3 manual modes.



External links[edit]