nicob333

I just ordered the RS Racechip for my 2014 CLS63-S and it has 3 pairs of different connectors instead of only 2 as in the installation instructions. Does anyone know where the 3rd connector pair goes that is labeled "C"?

CLS63Matt

Why did you go with this setup instead of all the other tuners?

nicob333

It's a piggy back system that does not make changes to the ECU of the car and can be removed easily before service. I also have a 4 year extended warranty that may be effected with other tuners. It also improves HP and torque by 30% and mpg by 15% so is advertised. Are you familiar with the RaceChip installation?

Jan AMG

I have spoken to Racechip and they seem like a nice company, for what they offer, it is amazingly cheap. But I wouldn't plug anything like they are offering (it basically only bumps fuel maps) to a sophisticated engine like the M157. Racechip could be well suitable for stupid VW diesels.
If you want to chip your CLS63, go with http://www.performmaster.com/cls63-amg/

nicob333

Not smog legal in California.