angelo63

there are some tunes out there that claim close to the same hp and alot less expensive some input plz

_AMG_

There is no such thing as a "best tune".
Is Renntech a good tuner? Yes.
Are there other tunes that have proven results? Yes.
This is a difficult question to answer, my advice would be to do some research. People with different tunes will give you different answers.

freefall

I did a lot of research on this that started with a thread that got a little out of hand. _AMG_ you were there...
Here is the conclusion I came to:
You find a company that you trust and that will stand behind their tune. I narrowed it down to 3 that I considered solid.

_AMG_ is an OE guy and I went Renntech and I'm sure he's as happy as I am...

_AMG_

Lol, You said it best brotha!

As long as your happy with which ever tuner you go with then that's all that matters.
Renntech has done an amazing job with these M157 monsters!

jacob502

NO. HELL NO!

Ali_E55

LOL

care to share ?

m_berman

From Eli 55 plug/tune issue be somewhat wiser to consider a tune:

1. Does not break the seal on the ECU
2. MB Star Diagnostic is not locked out of ECU
3. Does not push the Engine to its limits (engine should last 150K mi)
4. ECU can return to stock (need company to be around for at least 5 yrs)
4. Warranty (read the fine print)

freefall

Ali's time with WOT is something that would be very hard to match so I'd say he pushed it to the extremes.

As far as the other points as it relates to the ECU I can add this:
I brought my car into the dealer, after the Renntech tune, and they put her through star diagnostics. It was in fact a bad spark plug and they fixed it under warranty. I had no issues whatsoever.

Also - We all know our beloved CLS is one fat *ss biatch to get moving but with a tune you'll run side by side with most of the best...until you have to turn anyway...

I'll be doing SBS at Willow in a couple of weeks. Will post videos of what AMG + Renntech can do...

Ali_E55

STAR works for checking fualts and all car status, i was to lazy to return it to stock and maybe they saw more boost or diffirent timing, but they also said it can not be updated if MB release an update for our engine software.

Ali_E55

thats so true, and i will keep driving it hard, i bought it to enjoy it and i tuned it to smoke it

i am really thinking of adding a large H/E now for long WOTs

freefall

I thought they could update it but if they did it would wipe out the tune.

Thats more of a question than a statement

Ali_E55

thats what the senior SA said.

i stopped arguing with them because they always colse the discussion " we are the dealer and we know better"

Mr. Happy

You may want to read my thread on this topic...it's not only true for Kleemann BTW...

https://mbworld.org/forums/c63-amg-w...isible-mb.html

freefall

Good stuff. Thank you.

Personally though I have no concerns. I either mod my favorite car and take my chances or I spend at least 50K more on a car that comes with the same performance. So the way I see it, until I blow my engine, I'm ahead...

And who am I kidding...I would tune the more expensive car too...

rband

Will there ever be a tune for the new C218 that you can flash yourself?

JumpinJim

I picked Renntech as it was the only tune the service manager was comfortable with allowing on the car without having warranty problems with them.

freefall

+1

ajag

I agree completely. And what car would you get for 150-160k with comparable qualities and performance? Maybe a Panny Turbo S? But I just can't get past the looks...

freefall

For years I was getting stuff from Porsche on that car...I could't wait. Then when I saw it I was like damn........what the hell happened from the concept drawing early on!

Sooooo glad AMG did it right on the 218!

We two peas in a pod or what Ajag...