Transmission shifts soft even after installing a tune?
A transmission that shifts softly even after installing a transmission tune, can indicate several issues. The soft shifts especially under
Read more →
Firmware TuningFaster · Firmer · Smarter
All VariantsW211 · W215 · R230
Proven CalibrationsBuilt for Performance
Fast Shipping!Ships World Wide.
OEM Plug and Play TCU Shipped to YouOEM Mercedes EGS52 TCU
Online Support 24/7 by EmailTechnical Support
MK-ULTRA ELECTRONICS
ADVANCED ELECTRONICS & TUNING FOR EVERY MAKE & MODEL
We don't just specialize in one brand—we engineer solutions for all vehicle makes and models.
- ECU & TCU Tuning
- Module Cloning & Programming
- Transmission Electronics & Hardware Repair
Bench-tested every day. Proven performance for every build.
SHOP ALL PRODUCTS →
FEATURED PRODUCTS
VIEW ALL PRODUCTS →
LATEST NEWS
VIEW ALL POSTS →Sothern Hotrod Transmission TCU versions are important!
You must put it down in your order if you have Sothern hotrods transmission with their 200% valve body! It
Read more →722.6 Adaption Procedure. Important for best shift quality.
Tuned TCU that I ship have adaption tables cleared to Zero. Shifts will be Very Firm and torque reduction during
Read more →New TCU Version SLR Black Series For S55-SL55-CL55-E55-CLS55.
After 6 months of development, testing, modeling and data logging our new release is a game changer, bringing major changes
Read more →