ATTENTION! This tune is only available in person at Weistec, located in Anaheim, California, or in person at select Cypher Pro Dealerships.
Call for more details.
About the Mercedes-Benz 8 Speed Dual Clutch Transmission
The Mercedes-Benz 8G-DCT (Dual Clutch Transmission) is a high-performance transmission that combines the convenience of an automatic
with the efficiency and control of a manual. It uses two separate clutches for odd and even gear sets, allowing for lightning-fast
gear changes without interrupting power delivery. This results in improved acceleration, fuel efficiency, and overall driving
experience. The 8G-DCT is commonly found in various Mercedes-Benz models starting in the late 2010s, including the A Class, B Class, CLA Class,
and GLA Class. See our vehicle application guide for more details.
What is a TCU Tune?
The transmission is controlled by a small computer in your vehicle known as the TCU (transmission control unit). A TCU Tune changes
the software that the TCU is running. By doing this, it changes the way the TCU "thinks," making it operate differently. The Weistec
calibration team has carefully designed a TCU tune for your Mercedes-Benz A Class, B Class, GLA Class, and CLA Class. While our
TCU tune doesn't add any additional horsepower or torque, it does optimize how your vehicle puts its power to the pavement
through the transmission. This is essential to get the most out of your performance upgrades. How does the TCU tune accomplish this?
Our TCU tune increases software torque limits and operational line pressure to help increase torque capacity and shifting speed
while reducing the chances of slip. Less slip means less wear and tear on the DCT clutches in your transmission.
What does this all mean for you? Better performance overall when combined with ECU tuning and other power-adding upgrades.
Key Features:
Vehicle fitment
- 2019-2023 Mercedes-Benz CLA45 AMG Coupe
- 2019-2023 Mercedes-Benz CLA45 AMG S Coupe
- 2019-2023 Mercedes-Benz CLA45 AMG S Shooting Brake
- 2019-2023 Mercedes-Benz CLA45 AMG Shooting Brake
- 2019-2024 Mercedes-Benz A45 AMG S Hatchback
- 2019-2024 Mercedes-Benz A45 AMG Hatchback
- 2020-2021 Mercedes-Benz CLA250e Shooting Brake
- 2020-2024 Mercedes-Benz B250e Base
- 2020-2024 Mercedes-Benz CLA250e Coupe
- 2020-2025 Mercedes-Benz A250e Base
- 2021-2022 Mercedes-Benz A200 4MATIC
- 2021-2023 Mercedes-Benz GLA45 AMG Hatchback
- 2021-2023 Mercedes-Benz GLA45 AMG S Hatchback
- 2022-2023 Mercedes-Benz A220 4Matic
- 2022-2023 Mercedes-Benz A250 4MATIC
- 2022-2025 Mercedes-Benz A35 AMG Base
- 2024-2025 Mercedes-Benz CLA35 AMG Coupe
Weistec part number: 05-139-00323-6
All products are shipped out from one of the Signature Autohaus shipping locations. Signature Autohaus drop ships some products and ships direct others. All products are shipped via FedEx, UPS, DHL or another qualified shipping carrier.
Special arrangements may need to be made for international orders and oversize packages.
In the event a product arrives damaged to your location, please follow the steps listed below. All damaged items must be reported to the shipping carrier immediately and you must notify Signature Autohaus within 5 days of receiving your order. If these steps are not followed, your shipment may not be able to be a candidate for a claim.
Complete the Shipping DAMAGE Claim Form by contacting the carrier that delivered your package.
1) Keep the product and its original packaging and box
Make a list of the damaged or lost item(s)
2) Signature Autohaus will contact the shipper once we receive the email info above to schedule a pickup, DO NOT send it back to us
3) Once the product is picked up and inspected by Signature Autohaus and or Supplier, a replacement or credit will be issued.
4) The Shipping Rates shown at time of checkout our dimensional rate only. If your shipment weight is to much then contact us for a shipping quote. If there is an error in the shipping rate quoted we will contact you and let you know of the changes. International orders(Outside the USA) are not automatically processed as we may require additional information from you.
If a product is ordered and not wanted, the UNUSED item can be returned for a 35% restocking fee. Shipping is not refundable in either direction. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the Signature Autohaus warehouse are shipped via FedEx or Freight and require a signature when delivered. Some packages shipped from the manufacturer may or may not require signatures for package release. Fedex, UPS, and DHL have package pick up locations if you are unable to sign for the package. If the package is returned to Signature Autohaus or manufacturer, you will be responsible for the return shipping costs and pay a 35% restocking fee. These fees will be charged to your account on file.
SIGNATURE AUTOHAUS DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return, will not cover any expenses related to the product or installation, and you maybe be required to purchase a replacement.
In the event that the product you ordered is sent either incorrectly or processed wrong by Signature Autohaus, we will arrange for the package to come back to us and ship out a replacement. We will evaluate the situation before we determine the shipment was incorrect.
To return a item back to us, please do the following:
1. Contact our Customer Service Department to receive a RMA number. All packages returned without a Returned Merchandise Authorization number will be refused.
2. Package the item up in original packaging unless deemed unuseable
3. Include the UNUSED parts and any additional information that was included
4. Include a copy of your receipt
5. Write a brief description of the problem with the product
6. If you have a receipt for the return shipping include as well
7. We DO NOT accept any freight collect packages
8. Once we have received the above information we will notify you via email or phone and let you know the status.