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  • Performance
    • M113 E500 / CLS500
    • M113K E55 / CLS55 / S55
    • M156 C63 / E63 / CLS63
    • M157 E63 S / CLS63 / S63
    • M177 C63 / C63 S
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    • M278 E550 / CL550 / S550
  • Mercedes Ownership Essentials
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Performance Picks

Name the platform, we've got it.

  • Mercedes-Benz M113K ECU Tuning for E55, CLS55, SL55, S55, and G55 AMG

    M113K ECU Tuning – E55 AMG CLS55 SL55 S55 V8 Kompressor Upgrade

    M113K ECU Tuning – E55 AMG CLS55 SL55 S55 V8 Kompressor Upgrade

    Regular price $849.00 USD
    Regular price Sale price $849.00 USD
    Unit price /  per 
  • M157 K&N Performance Air Filters + Airbox Spacer Kit

    M157 K&N Performance Air Filters + Airbox Spacer Kit

    M157 K&N Performance Air Filters + Airbox Spacer Kit

    Regular price $300.00 USD
    Regular price Sale price $300.00 USD
    Unit price /  per 
  • Close-up of T-304 stainless steel M156 long tube performance headers with midpipes, designed for Mercedes-Benz AMG vehicles, showcasing precision welds and direct-fit W204 chassis compatibility.

    M156 Long Tube Headers with Midpipes for C63 AMG E63 CLS63

    Sale

    M156 Long Tube Headers with Midpipes for C63 AMG E63 CLS63

    Regular price $1,750.00 USD
    Regular price $1,999.00 USD Sale price $1,750.00 USD
    Unit price /  per 
    Sale
  • Mercedes W205 C63 C63S auxiliary heat exchanger with premium carbon fiber air baffle and mounting bracket

    Mercedes C63 AMG / C63 S Auxiliary Heat Exchanger + Carbon Fiber Air Baffle (W205 · M177)

    Mercedes C63 AMG / C63 S Auxiliary Heat Exchanger + Carbon Fiber Air Baffle (W205 · M177)

    Regular price $649.00 USD
    Regular price Sale price $649.00 USD
    Unit price /  per 

Precision-Engineered Catless Downpipes

Reduce Restriction, Increase Horsepower, Improve Response.

  • Stainless steel catless downpipes for Mercedes E63 AMG E63S W213, performance exhaust upgrade by BenzUnited Parts

    M177 Catless Downpipes for Mercedes-AMG GT 63 (X290) & E63 / E63S (W213) – 304 Stainless Steel

    Sale

    M177 Catless Downpipes for Mercedes-AMG GT 63 (X290) & E63 / E63S (W213) – 304 Stainless Steel

    Regular price From $649.00 USD
    Regular price $850.00 USD Sale price From $649.00 USD
    Unit price /  per 
    Sale
  • 304 stainless steel catless downpipes for Mercedes-Benz S550 W222 and C217 with the M278 4.7L V8 BiTurbo

    M278 Catless Downpipes – Mercedes S550 W222 Sedan (2014–2017) & C217 Coupe (2015–2017) 4.7L V8

    M278 Catless Downpipes – Mercedes S550 W222 Sedan (2014–2017) & C217 Coupe (2015–2017) 4.7L V8

    Regular price $849.00 USD
    Regular price Sale price $849.00 USD
    Unit price /  per 
  • Ceramic coated downpipes with premium flex sections on both ends for Mercedes C43 AMG, C450 AMG, E43 AMG, E400, E450 M276 3.0T – full product pair view

    M276 Ceramic Coated Catless Downpipes with Flex Sections – C43 E43 E400 E450

    Sale

    M276 Ceramic Coated Catless Downpipes with Flex Sections – C43 E43 E400 E450

    Regular price $595.00 USD
    Regular price $799.00 USD Sale price $595.00 USD
    Unit price /  per 
    Sale
  • Catless stainless steel downpipe for Mercedes-AMG CLA45 and GLA45 with M133 engine

    M133 Catless Downpipe for Mercedes CLA45 / GLA45 AMG (2014–2019)

    Sale

    M133 Catless Downpipe for Mercedes CLA45 / GLA45 AMG (2014–2019)

    Regular price $449.00 USD
    Regular price $699.00 USD Sale price $449.00 USD
    Unit price /  per 
    Sale

Mercedes Performance & Technical Guides

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  • 722.6 Valve Body & Shift Solenoid Upgrades: Why...

    July 23, 2026

    Shift flare, slipping under boost, or limp mode after adding power to a C32, SLK32, E55, CLS55, SL55, S55, CL55, S600 or CL600? Here is why the 722.6 struggles with...

    722.6 Valve Body & Shift Solenoid Upgrades: Why...

    July 23, 2026

    Shift flare, slipping under boost, or limp mode after adding power to a C32, SLK32, E55, CLS55, SL55, S55, CL55, S600 or CL600? Here is why the 722.6 struggles with...

  • M113K Build Guide: Making Real, Repeatable Powe...

    July 23, 2026

    A complete M113K build guide for the E55, CLS55, SL55, S55, CL55 and G55 — supercharger pulley selection, clutched vs clutch delete, shorty vs mid-length headers and how to choose,...

    M113K Build Guide: Making Real, Repeatable Powe...

    July 23, 2026

    A complete M113K build guide for the E55, CLS55, SL55, S55, CL55 and G55 — supercharger pulley selection, clutched vs clutch delete, shorty vs mid-length headers and how to choose,...

  • AIRMATIC Visit Workshop? The Complete W211 / CL...

    July 23, 2026

    AIRMATIC Visit Workshop message, sagging corner, dead compressor? A complete guide to converting a W211 E-Class or C219 CLS from air suspension to coilovers — including the non-AIRMATIC rear lower...

    AIRMATIC Visit Workshop? The Complete W211 / CL...

    July 23, 2026

    AIRMATIC Visit Workshop message, sagging corner, dead compressor? A complete guide to converting a W211 E-Class or C219 CLS from air suspension to coilovers — including the non-AIRMATIC rear lower...

  • The W211 E350 PZEV Fuel Tank Problem: Why a "Fu...

    July 23, 2026

    A plain-English guide for 2006–2009 Mercedes-Benz E350 (W211) owners with a PZEV low-emissions fuel system — what actually fails, why the dealer repair runs about $3,000, whether the tank is...

    The W211 E350 PZEV Fuel Tank Problem: Why a "Fu...

    July 23, 2026

    A plain-English guide for 2006–2009 Mercedes-Benz E350 (W211) owners with a PZEV low-emissions fuel system — what actually fails, why the dealer repair runs about $3,000, whether the tank is...

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BenzUnited Parts sources OEM and performance upgrades for Mercedes-Benz platforms — from daily drivers to full builds, with fast shipping and fitment support from people who know these cars inside and out.

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