Shop Our Clearance Sale - Up To 80% Off FREE SHIPPING on Orders $49+ *exclusions apply
affirm financing terms & conditions

Menu

Call Us330-331-2003 ChatLive Chat Text Us!
0 Shopping Cart
Your Vehicle Clear

2012 Mercedes Benz CLS550 Base Sedan 218.373 V8 4.6L

    • Audi
    • BMW
    • Mercedes Benz
    • MINI
    • Porsche
    • Volkswagen

Saved Vehicles

My Vehicles
You currently have no stored vehicles.

Recent Vehicles

Recent Vehicles Manage Vehicles

You currently have no recent vehicles.

We'll automatically keep fully selected vehicles here for your convenience.

Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
0
Call Us330-331-2003 ChatLive Chat Text Us!
Track My Order View Order History Submit a Return Contact Us Wholesale Information Lifetime Replacement Returns and Warranty Information
Cancel
0
Sales & Specials
Enter Your Vehicle
affirm financing terms & conditions
garage-red
Your Vehicle 2012 Mercedes Benz CLS550 Base Sedan 218.373 V8 4.6L
Your Vehicle 2012 Mercedes Benz CLS550 Base Sedan 218.373 V8 4.6L
Change Clear

2012 Mercedes Benz CLS550 Base Sedan 218.373 V8 4.6L Engine Parts & Accessories

Sort By
Filter By
Return to Top

Remanufactured Engine Water Pump

Price includes a refundable $51.73 core charge affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
4687900
Mfg#:
278200050180KT
Ships in 3 Business Days
$472.99

This product was last offered at the strikethrough price on
01-06-2026

$423.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel System Control Unit - Remanufactured

Price includes a refundable $20.69 Core Charge affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
4685337
Mfg#:
000900620780KT
Ships in 3 Business Days
$246.00

This product was last offered at the strikethrough price on
01-06-2026

$219.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Throttle Body

Electronic assembly for intake air affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
2549212
Mfg#:
2781410025
Ships in 3 Business Days
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$1520.00

This product was last offered at the strikethrough price on
01-06-2026

$1412.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Pump Assembly

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
2746055
Mfg#:
2044704594
Ships in 3 Business Days
$215.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Negative Battery Terminal Cable

Includes Sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
2845899
Mfg#:
0009056702
Ships in 3 Business Days
7% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$160.00

This product was last offered at the strikethrough price on
01-06-2026

$148.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

M157 / M278 Valve Cover Reseal Kit

ES#5456803 - M157M278RSKT3 - M157 / M278 Valve Cover Reseal Kit - Reseal your leaking M157 or M278 valve covers the right way with genuine liquid sealant, new aluminum hardware, and high pressure fuel pump seals. - Genuine Mercedes Benz - Mercedes Benz

Reseal your leaking M157 or M278 valve covers the right way with genuine liquid sealant, new aluminum hardware, and high pressure fuel pump seals. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
5456803
Mfg#:
M157M278RSKT3
Ships in 6 Business Days
$463.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Complete M157 / M278 Engine Cylinder Head Valve Cover & Front Upper Timing Covers Reseal Kit

ES#5456410 - m157m278rsKT - Complete M157 / M278 Engine Cylinder Head Valve Cover & Front Upper Timing Covers Reseal Kit - Includes Genuine Mercedes-Benz Sealant, all new hardware, camshaft adjuster seals for a perfect reseal. - Genuine Mercedes Benz - Mercedes Benz

Includes Genuine Mercedes-Benz Sealant, all new hardware, camshaft adjuster seals for a perfect reseal. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
5456410
Mfg#:
M157M278RSKT
Ships in 6 Business Days
$800.99

This product was last offered at the strikethrough price on
04-14-2026

$764.00 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

UPD High Flow Cold Air Induction Kit - M278

ES#5470454 - MBCABK278 - UPD High Flow Cold Air Induction Kit - M278 - Unlock hidden M157 power with the UPD Cold Air Induction Kit - OEM style fitment with dyno-proven gains of up to 25WHP! - Ultimate Performance And Design - Mercedes Benz

Unlock hidden M157 power with the UPD Cold Air Induction Kit - OEM style fitment with dyno-proven gains of up to 25WHP! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Ultimate Performance And Design - Corporate Logo
ES#:
5470454
Mfg#:
MBCABK278
Ships in 6 Business Days
$450.00 USD
This product is lifetime replacement eligible Lifetime Replacement

M157 / M278 Oil Filter Housing Assembly

Includes cap, filter and gasket affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5388749
Mfg#:
2781800710
Ships in 6 Business Days
Auto Notify
ON SALE! SAVE 55%
$199.99

This product was last offered at the strikethrough price on
01-03-2026

$89.75 USD
Free Shipping
on orders $49 and up

M157 / M278 Engine Gasket Set

Comprehensive gasket set for engine rebuilds affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Mercedes Benz - Corporate Logo
ES#:
5341453
Mfg#:
M157M278EGSKT
Ships in 6 Business Days
$831.99

This product was last offered at the strikethrough price on
01-06-2026

$772.99 USD
This product is lifetime replacement eligible Lifetime Replacement

M157/M278 Cylinder Head Bolt - Set Of 20

M157 / M278 Head Bolt - One Time Use. A full set to secure your cylinder head. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5388726
Mfg#:
278016016964KT1
Ships on Jul 28, 2026
$291.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Bolt - Set Of 10 (11x173mm)

M157 / M278 Head Bolt - One Time Use - Twenty (20) Required Per Engine affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5388723
Mfg#:
278016016964
Special Order: No Guaranteed ETA
$145.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector Seal Ring - Priced Each

Located at the base of the fuel injector affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
2X Entries For Our G87 M2 Sweepstakes!

Brand:
Elring - Corporate Logo
ES#:
5373810
Mfg#:
2760160021
Special Order: No Guaranteed ETA
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Mercedes M278 Spool FX-170 Upgraded High Pressure Pump Kit

The stock HPFP on the M278 Motors is severely limited in capacity when trying to raise the output of the motor. The FX-170 adds 50% more flow, raising the fueling limits and helping you achieve more power! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Spool Performance - Corporate Logo
ES#:
4736464
Mfg#:
SP-FX-M278
Special Order: No Guaranteed ETA
$3499.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Fuel Pump Assembly

Position - Right affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
5375044
Mfg#:
2184700094
Ships on Aug 10, 2026
Auto Notify
ON SALE! SAVE 20%
$352.99

This product was last offered at the strikethrough price on
05-02-2026

$282.33 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Valve Stem Seal - Priced Each

ES#2864921 - 0000534658 - Valve Stem Seal - Priced Each - For repair or changing valve in the cylinder head - Febi - Mercedes Benz

For repair or changing valve in the cylinder head affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2864921
Mfg#:
0000534658
Special Order: No Guaranteed ETA
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings