Weistec Engineering – Mercedes-Benz M273 ECU Tune

Description

Weistec Engineering ECU tune for the M273-powered Mercedes-Benz models (2005-2015) with the 5.5L V8 (M273). Weistec’s crank figures put the tuned engine at 416 hp and 420 lb-ft, up from 382 hp and 391 lb-ft stock, from a recalibration of the factory ECU software.

Key Features:

• Up to +34 hp / +29 lb-ft: Weistec’s crank estimate of 416 hp and 420 lb-ft, from Dynojet testing; real gains depend on fuel, conditions and supporting modifications.
• Stage calibrations: W.1 (Stock Vehicle) and W.2 (Race Exhaust fitted), so the calibration matches the hardware on your car.
• Optional add-ons: 7 Speed TCU Tune (Pre-2019) and 722.6 EGS52 TCU Upgrade, each selectable when you order.
• Reflash of the factory ECU: the original module is recalibrated rather than replaced with a stand-alone or piggyback unit.
• What changes: improved throttle response, optimized fuel and spark and top speed limiter removed.
• Tuning method: Cypher Plus: flashed at home from your phone with a Weistec Cypher Plus.

Fitment:

• Mercedes-Benz CL500 2007-2010 (C216) – 5.5L V8 (M273)
• Mercedes-Benz CL550 2006-2010 (C216) – 5.5L V8 (M273)
• Mercedes-Benz CLK500 2005-2009 (C209 / A209) – 5.5L V8 (M273)
• Mercedes-Benz CLK550 2006-2009 (C209 / A209) – 5.5L V8 (M273)
• Mercedes-Benz CLS500 2007-2010 (C219) – 5.5L V8 (M273)
• Mercedes-Benz CLS550 2006-2011 (C219) – 5.5L V8 (M273)
• Mercedes-Benz E550 2006-2011 (W211 / W212 / C207 / A207) – 5.5L V8 (M273)
• Mercedes-Benz G500 2009-2015 (W463) – 5.5L V8 (M273)
• Mercedes-Benz G550 2009-2015 (W463) – 5.5L V8 (M273)
• Mercedes-Benz GL450 2006-2012 (X164) – 4.7L V8 (M273)
• Mercedes-Benz GL500 2006-2012 (X164) – 5.5L V8 (M273)
• Mercedes-Benz GL550 2006-2012 (X164) – 5.5L V8 (M273)
• Mercedes-Benz ML500 2008-2011 (W164) – 5.5L V8 (M273)
• Mercedes-Benz ML550 2007-2011 (W164) – 5.5L V8 (M273)
• Mercedes-Benz R500 2008-2014 (V251) – 5.5L V8 (M273)
• Mercedes-Benz S450 2006-2010 (W221) – 4.7L V8 (M273)
• Mercedes-Benz S500 2005-2011 (W221) – 5.5L V8 (M273)
• Mercedes-Benz S550 2006-2011 (W221) – 5.5L V8 (M273)
• Mercedes-Benz SL500 2007-2011 (R230) – 5.5L V8 (M273)
• Mercedes-Benz SL550 2007-2012 (R230) – 5.5L V8 (M273)

Not legal for sale or use on pollution-controlled motor vehicles; intended for competition use. Talk to us before ordering to confirm the right stage and tuning method for your car.