Dear all,

I'm considering getting my GL63 chipped, I know that Renntech's offering more power and possibly at a lower price compared to brabus, but from what I know by reading previous posts regarding tuning ecu's, renntech has to have our ecu drilled plus changing to a cooler spark plug, whereas brabus seems to be selling a module to be attached under the steering so it can modify the ecu remotely and never mentioned about spark plugs, anyone compared these two? would love to know everyone's opinions.

 

I have no personal familiarity with Brabus but Renntech surpassed my expectations when I did their ecu/tcu tune on my last twin turbo vehicle.