Mercedes 722.9 Seven Speed Transmission Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 CLASS S LONG (W 221)

CLASS S LONG (W 221) 350 4-matic [2 Filters Required] (HP: 272 | Year: 07 > 11)

RL (No tall bracket option is available for the Roadsters)

ECU Upgrade | Up to 638HP / 695TQ | Gains: +88HP / +151TQ

CLASS R LONG (W 251) 500 4-matic [2 Filters Required] (HP: 306 | Year: 05 > 07)

Hihg-Flow Air Filter

Mercedes 722.9 Seven Speed Transmission Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 CLASS S LONG (W 221)RENNtech Transmission Upgrade for 722. 9 Mercedes Seven Speed Transmissions. With increased engine performance it becomes necessary to further improve the drive line components, most importantly the transmission in order to ensure maximum power is transmitted to the drive wheels without transmission slippage. This can not be realized with software and only truly be accomplished by an internal mechanical upgrade to the transmission hardware. RENNtech