pttk

Any experience changing the TCU of a 2006 C55 AMG?

I would like the changes to happen faster with the paddle.

I am watching this https://www.weistec.com/722-6-tcu-upgrade.html

Thank

Plutoe

you will do better if you buy a hot dog

markyoussef

Vtech Georgia makes a great TCU for our cars. Gives you more rpms to play with and shifts incredibly quicker than stock. I tried the DTK one as well and wasn't too pleased with the upshifts (downshifts were crazy though).

brauhaus313

You have first hand experience with Vtech Georgia TCU programming?

markyoussef

Yes. They have also dyno tuned my C55.

brauhaus313

Thanks. So does he send you a programmed TCU or do you have to mail him yours? You say Vtech is better than the DTK you tried, but there's been some accounts out there that they are actually the same people. You say they dyno tuned your C55, does that mean you are local to them in Georgia?

In any case, do you notice faster/smoother/harsher shifting in normal auto and paddle shifting? Are shift points raised? Would appreciate your feedback. There's not much out there as far as real world experience with the Vtech TCU.

pttk

https://vtech.ge/en/products-en/14-m...u-tune-12.html

https://www.weistec.com/722-6-tcu-upgrade.html

I have not decided yet when to buy, but I want the changes to pass faster, Vtech is much cheaper

markyoussef

I’ve never heard of DTK and Vtech being the same person lol. I’ve talked with both of them and I think it’s fair to say that they’re 2 different companies.

I’ve been running the Vtech TCU for a couple months now. Shifts are more aggressive with driving normally and can be jerky at times. If using the paddle shifters, it lets you use up until 7k rpms (I’d shift earlier personally and so you can avoid the car bogging). Downshifts are also pretty aggressive (DTK is more aggressive though).

With the DTK TCU (I haven’t ran it in a couple months so this is off of my memory) I don’t recall noticing any harshness when driving normally. It doesn’t give you more RPMS and isn’t too much faster than stock. It was very aggressive downshifts and whenever I was on backroads I loved it personally.

Summary: I’d say the DTK is for the person who daily drives their C55 and wants the occasional fun. If you’re serious about going fast though, go with the Vtech TCU. It’s still very fun but I’d say the DTK one was slightly more fun. This is just my personal opinion though.

pttk

Now that some cooperate with comment on Weistec TCU https://www.weistec.com/722-6-tcu-upgrade.html

brauhaus313

By aggressive, do you mean faster and/or more abrupt/harsh? Sounds like when either DTK/Vtech shift more "aggressive," the shifts perhaps aren't very smooth. I would want faster yet still smooth up and downshifts, particularly when manual button shifting. That second and a half or so delay when button shifting is no good.

Also, on FB DTK states they only work on cars with the 55k motor, yet they provided you with a TCU for your C55?

markyoussef

I really don't see why you would be interested in Weistec's TCU. You can buy Vtech and DTK's TCU and still have about $100 to spare for the cost of the Weistec one. I honestly didn't know they made one for our cars.

markyoussef

It's faster and harsher than stock. I'd say the shifts are still smooth. The shifting is certainly faster; anytime I race an M113/M113K car it's noticeable the difference that the TCU makes. For 200 bucks don't see how you could go wrong.
DTK doesn't publicly list that they make a C55 TCU, but if you ask them they do. At the end of the day we all share the 722.6 transmission.

pttk

I'm just seeing and collecting opinions, I still haven't decided which one to buy.

I just want the changes to happen faster

markyoussef

Understandable, I'd love to hear what people have to say about the Weistec one. If your primary concern is faster upshifts I think you'll be satisfied with Vtech. It's not DCT fast by any means but it's a definite improvement over OEM.

pttk

Thank you very much, I will consider buying the Vtech, apparently it is the most convenient for what I hope

A question, is it plug and play or is it necessary to record the VIN?

markyoussef

It is plug and play, not locked to VIN.

TCU install is also quite easy. Firstly, remove the front passenger floor mat. Then pull back the carpeting and you'll see a foam movable piece along with a silver piece that is bolted in. Simply unbolt the four bolts that hold it in (can be a little hard to do but shouldn't take more than 5 minutes). If you push it back you'll see the TCU.

pttk

Fantastic, do it yourself. And if it doesn't go well, put the original back

Thank

caldw3ll

I was looking into this as well. For the price I'd hope it was worth it.