Mercedes | 722.9 Seven Speed | Transmission Software Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 E 63 (W212) Stock performance:

E 63 (W212) Stock performance:

1 sec 136 mph *If not otherwise noted

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7L V8 BiTurbo) Stock Performance (at crank):

Mercedes | 722.9 Seven Speed | Transmission Software Upgrade mercedes-benz-cls-class--218---2015-2018--cls-550-biturbo-esr2270978 E 63 (W212) Stock performance:RENNtech Transmission Software Upgrade for 722. 9 Mercedes Seven Speed Transmissions for CLS and E Class. 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. Especially with the newest generation of the C218 CLS 63 AMG and W212 E 63 AMG, the transmission has been the weak