anyone used speed tuning usa ecu upgrade
#2
MBWorld Fanatic!
Somebody on here did on his CLK500 and I remember him saying that he definitely felt an improvement in power, especially low end. He also said he didn't have any problems. I really want to get this speed tuning chip because of price but I first have to make sure it won't mess up my car or void warranties.
#7
Hey i was the one with the upgrade heres a link to my post https://mbworld.org/forums/showthrea...speedtuningusa ive went into the dealer for service and i havent had a problem with warranty or with my car hope this helps