19E63s

I just picked up another 19' E63s. I had one before, then traded it in on a 2020 GLC 63. Now.. I have traded that in again for a CPO 19' E63s with 1300 miles on it. I'm hoping for better results than my last one.
Either way! I'm on the fence about a tune. I had the 2020 GLC 63 tuned with Renntech HHT, had some weird misc problems. It was brand new for 2020, so I can't fully blame Renntech. Although, they should have done some R&D before releasing it.
My question is what tune does everyone recommend? PLEASE ONLY SUGGEST SOMETHING IF YOU ACTUALLY HAVE THE TUNE!

Thanks everyone.

aaronpass

I’ve been very happy with my Eurocharged stage 2

raudiace4

Did you do the CPC and TCU tune too?

aaronpass

Not yet. Still contemplating

19E63s

have you had any minor problems or noticed any weird changes? like I said there were a few things with the Renntech tune I did not like. Also, would you say the extra gains are worth it?

Thanks!

WIKDWGN

Care to elaborate on what you were experiencing with the HHT? I had a Eurocharged tune when catless and had zero issues. Went to high flow catted downpipes and HHT and haven’t had any issues there either. I’ve been meaning to dyno with the current set up, car made 668whp catless / eurocharged.

19E63s

I had a 2020 GLC 63. Which was a facelift for 2020. New software. So long story short - tried to do it November of 2019, new software, wouldn't work. So got a refund and had to wait until they had their hands on a 2020.
Come Feb. 2020 I purchase it. It works. I noticed a difference, nothing crazy. The worst parts was multiple CEL. About 3 weeks after I tuned the car I was going down the highway, average speeds. It shifted, made a grinding noise. Got a ***blinking*** CEL. A power cycle made it go away.
Ever since then, it would occasionally do this weird grinding around 6 or 7th gear. Another problem with it was they advertise a 3.25 0-60 with race start. I NEVER got better than a 3.5, and I only got 3.5 ONCE.
I also got the car dyno'd, I sent them the sheet to show it wasn't producing the power they said. The rep didn't really care, and at the end it was dismissed as "the run was stopped short, while the car was still building power"
Forgot to add this too - after the tune, occasional when building power in 2nd gear it would like cut power and knock. just normal driving, pulling out of a parking lot. It really worried me. So I traded it in.
Just an overall poor experience. The E63s is plenty fast now. That was the problem, the 20 GLC 63 just wasn't fast enough for my liking.

I've been thinking about Eurocharged. You've never had a single problem?

HappE63s

I also have eurocharged stage 2 and have not had any problems with my car except for the exhaust flap issue that is probably not related to the tune .

cajun1689

I would look at AMR i loved their tunes in the past and the owner has our car and dailys it.

Clk63blkseries

leave is stock drive the **** out of it and never worry about a bad tune causing issue or not living up to claims just my 2cents

19E63s

Have to agree. I drive the **** out of my cars.