![RENNtech ECU Upgrade 135i E82 (2008-2010 Manual & Steptronic N54B30) mercedes-benz-c-class--205-sedan---2015-2022--c-450-amg-esr1355228 4 [2 Filters Required] (HP:](https://cdn.shopify.com/s/files/1/0753/9972/5312/files/ecu_m156_m272_m273_ee91aa83-44ca-4388-af3f-1ebe7fd97d83.jpg?v=1751275173)
Pay in 4 interest-free payments of $186.88 Learn more
Ships within 48 hours · Estimated delivery Oct 17 - Oct 22
4 [2 Filters Required] (HP: 626 | Year: 04 >)
521 wtq @ 5
due to the adjustments to the electronic OEM diverter valves
CLASS E SW (S 210) 200 Kompressor (HP: 186 | Year: 97 > 00)
Up to 352HP and 390 LB-FT
RENNtech ECU Upgrade 135i E82 (2008-2010 Manual & Steptronic N54B30) mercedes-benz-c-class--205-sedan---2015-2022--c-450-amg-esr1355228 4 [2 Filters Required] (HP:RENNtech ECU Upgrade 135i E82 (2008 2010 Manual & Steptronic N54B30). Up to 420 HP + 435 TQ. Gains: +120 HP +135 LB FT Our proprietary BMW ECU upgrade offers rock solid performance from RENNtech, the foremost tuning authority on Bosch and Siemens engine control units. These same units are utilized in Mercedes Benz vehicles, which RENNtech has been tuning since electronic engine management started to show up in vehicles during the mid 1980's, though
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