1. Does this set include the piston rings and wrist pins?

Yes. Genuine Mercedes-Benz pistons arrive fully assembled. Each piston comes pre-fitted with the exact factory-gapped upper compression rings, the lower oil control ring, the heavy-duty wrist pin, and the retaining circlips.

2. Are these standard size or oversized pistons?

Part number A2780302317 designates the Standard Bore size for the M278 engine. If your engine block has been machined or sleeved due to deep cylinder scoring, you must consult with your machinist to determine if standard-size pistons will still fit your new cylinder diameter.

3. Will replacing the pistons fix a scored cylinder block?

No. If your engine block's Silitec cylinder walls are deeply scratched or gouged (which is the usual reason for replacing M278 pistons), simply dropping in new pistons will not fix the issue. The engine block must be professionally machined and fitted with aftermarket steel or iron sleeves before the new pistons are installed.

4. Do I need to weigh or balance these before installation?

Genuine Mercedes-Benz pistons are manufactured to incredibly strict weight tolerances directly from the factory to ensure your V8 runs butter-smooth. However, professional engine builders will typically still verify the weight of the piston and connecting rod assemblies prior to final installation.

Do you ship internationally?

Yes, we ship to most countries worldwide.

How do I track my order status?

You can track your order directly through our website by following these steps:Go to the Europarts360 Tracking Page.You will see an option to search by Tracking Number or Order ID.Enter your number in the search bar.Click the "Track" button to view the current status of your shipment.

What is your return policy?

We offer a 14-day return policy for all unused items in original packaging.

What are your Warranty Policy?

This warranty covers all eligible products purchased through our website for 6 months from the date of purchase.

Mercedes-Benz M278 Piston (Set of 8) S550, E550, GL550, A2780302317 (11-20) Europarts360

Mercedes Benz Cl550 Cls550 E550 Gl450 Gl550 Ml550 S550 Sl550 Piston Set of 8 A2780302317 - Europarts360

-20%

Mercedes-Benz

Mercedes-Benz M278 Piston (Set of 8) S550, E550, GL550, A2780302317 (11-20)

~~$812.50~~

$648.75 Auf Lager Vorbestellung Ausverkauft

CODE: A2780302317

Kategorien: All European car parts, Engine Parts, European Auto Parts USA, German Car Parts, Mercedes CLS, Mercedes M-Class, Mercedes S-Class, Mercedes-Benz, Wholesale & Retail UAE

Specification	Details
Brand	Mercedes Benz
Model	CL550 CLS550 E550 GL450 GL550 ML550 S550 SL550
Year	2011-2020
Manufacturer Part Number	A2780302317, 2780302317
Type	PISTON SET
Condition	New Genuine
Placement on Vehicle	Front Engine bay
Country/Region of Manufacture	Germany
Manufacturer Warranty	6 Months
Superseded Part Numbers	278 030 15 17, 278 030 23 17, A278 030 15 17, A278 030 23 17

Tags:

Note: If you have any inquiries about the fitment of the part, please send us the VIN of the vehicle and we will verify the fitment for you.

Handling Time: 1–7 business days for order processing before dispatch.

Beschreibung
Fitment
Shipping
Bewertungen

Complete set of 8 Genuine OEM Mercedes-Benz Pistons for the 4.7L M278 BiTurbo V8. Fits CLS550, E550, GL450, ML550, S550, and SL550. Replaces A2780302317.

What’s Included

This describes a complete, factory-sealed Genuine Mercedes-Benz internal engine rebuild package.

8x Genuine Mercedes-Benz Pistons (Standard Bore, with Rings and Pins) - Replaces A2780302317

Component	Primary OEM Part Numbers	Common Supersessions & Formats
Piston Assembly	`A2780302317`	278-030-23-17, 2780302317, A2780301117, A2780301517

Fitment

Brand	Model	Year
Mercedes-Benz	CLS (C218) CLS 500	2011 - 2017
Mercedes-Benz	CLS (C218) CLS 500 4-matic	2011 - 2017
Mercedes-Benz	CLS Shooting Brake (X218) CLS 500	2012 - 2017
Mercedes-Benz	CLS Shooting Brake (X218) CLS 500 4-matic	2012 - 2017
Mercedes-Benz	E-CLASS (W212) E 500	2011 - 2015
Mercedes-Benz	E-CLASS (W212) E 500 4-matic	2011 - 2015
Mercedes-Benz	E-CLASS Convertible (A207) E 500	2011 - 2016
Mercedes-Benz	E-CLASS Coupe (C207) E 500	2011 - 2016
Mercedes-Benz	E-CLASS T-Model (S212) E 500	2011 - 2016
Mercedes-Benz	E-CLASS T-Model (S212) E 500 4-matic	2011 - 2016
Mercedes-Benz	GL-CLASS (X166) GL 500 4-matic	2012 - 2015
Mercedes-Benz	GLE Coupe (C292) 500 4-matic	2015 - 2019
Mercedes-Benz	M-CLASS (W166) ML 500 4-matic	2012 - 2015
Mercedes-Benz	S-CLASS (W221, V221) S 500 CGI	2011 - 2013
Mercedes-Benz	S-CLASS (W221, V221) S 500 CGI 4-matic	2011 - 2013
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500	2013 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 4-matic	2013 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 Maybach	2014 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 Maybach 4-matic	2015 - 2017
Mercedes-Benz	S-CLASS Convertible (A217) S 500	2015 - 2017
Mercedes-Benz	S-CLASS Coupe (C216) CL 500	2011 - 2013
Mercedes-Benz	S-CLASS Coupe (C216) CL 500 4-matic	2011 - 2013
Mercedes-Benz	S-CLASS Coupe (C217) S 500	2014 - 2017
Mercedes-Benz	S-CLASS Coupe (C217) S 500 4-matic	2014 - 2017
Mercedes-Benz	SL (R231) 500	2012 - 2020

Brand	Model	Year
Mercedes-Benz	CLS (C218) CLS 500	2011 - 2017
Mercedes-Benz	CLS (C218) CLS 500 4-matic	2011 - 2017
Mercedes-Benz	CLS Shooting Brake (X218) CLS 500	2012 - 2017
Mercedes-Benz	CLS Shooting Brake (X218) CLS 500 4-matic	2012 - 2017
Mercedes-Benz	E-CLASS (W212) E 500	2011 - 2015
Mercedes-Benz	E-CLASS (W212) E 500 4-matic	2011 - 2015
Mercedes-Benz	E-CLASS Convertible (A207) E 500	2011 - 2016
Mercedes-Benz	E-CLASS Coupe (C207) E 500	2011 - 2016
Mercedes-Benz	E-CLASS T-Model (S212) E 500	2011 - 2016
Mercedes-Benz	E-CLASS T-Model (S212) E 500 4-matic	2011 - 2016
Mercedes-Benz	GL-CLASS (X166) GL 500 4-matic	2012 - 2015
Mercedes-Benz	GLE Coupe (C292) 500 4-matic	2015 - 2019
Mercedes-Benz	M-CLASS (W166) ML 500 4-matic	2012 - 2015
Mercedes-Benz	S-CLASS (W221, V221) S 500 CGI	2011 - 2013
Mercedes-Benz	S-CLASS (W221, V221) S 500 CGI 4-matic	2011 - 2013
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500	2013 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 4-matic	2013 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 Maybach	2014 - 2017
Mercedes-Benz	S-CLASS (W222, V222, X222) S 500 Maybach 4-matic	2015 - 2017
Mercedes-Benz	S-CLASS Convertible (A217) S 500	2015 - 2017
Mercedes-Benz	S-CLASS Coupe (C216) CL 500	2011 - 2013
Mercedes-Benz	S-CLASS Coupe (C216) CL 500 4-matic	2011 - 2013
Mercedes-Benz	S-CLASS Coupe (C217) S 500	2014 - 2017
Mercedes-Benz	S-CLASS Coupe (C217) S 500 4-matic	2014 - 2017
Mercedes-Benz	SL (R231) 500	2012 - 2020

At Europarts360, we are committed to delivering premium automotive parts to you, wherever you are. We ship worldwide from our strategic warehouses in:

United States United Arab EmiratesUnited Kingdom Hong Kong

Order Processing

Standard orders

1–7 days

Business days to dispatch

Custom & special orders

Varies

Based on sourcing & availability

For custom and special orders, we will contact you directly with an estimated timeframe before dispatch.

Estimated Delivery Times

All the orders (WORLDWIDE)

2–5 days

Business days after dispatch

Custom & special orders

Varies

Based on sourcing & availability

International delivery times are estimates and may be affected by customs clearance procedures in the destination country.

Shipping Rates

United Arab Emirates Free Shipping

International Countries (Except UAE)
For all other destinations, rates are calculated by total order weight (1 kg = 2.205 lb):

Order Weight	Rate (USD)
0 – 5 kg (0 – 11 lb)	$60.00
5 – 10 kg (11 – 22 lb)	$85.00
10 – 15 kg (22 – 33 lb)	$100.00
15 – 20 kg (33 – 44 lb)	$135.00
20 – 30 kg (44 – 66 lb)	$175.00
30 – 40 kg (66 – 88 lb)	$250.00
40 kg and above (88 lb+)	$325.00

Planning a large purchase? Contact us before placing your order to ask about bulk shipping discounts.

Order Tracking

Once your order ships, you will receive a confirmation email with a tracking number. You can monitor your shipment through your Europarts360 account or directly on the courier's website (DHL, FedEx, UPS, etc.).

Customs, Duties & Taxes

For international orders, the recipient is responsible for all customs duties, taxes, and import fees levied by the destination country.
Europarts360 is not liable for delays caused by customs processing or incorrect shipping information provided at checkout.
Please double-check your delivery details before placing your order to ensure a smooth delivery.

Need Assistance?

Our customer support team is here to help.

Email info@europarts360.com

Call / WhatsApp (UAE) +971 568 908 800

Call / WhatsApp (USA) +1-818-851-0770

Frequently Asked Questions

Find answers to common questions about our products and services

Yes. Genuine Mercedes-Benz pistons arrive fully assembled. Each piston comes pre-fitted with the exact factory-gapped upper compression rings, the lower oil control ring, the heavy-duty wrist pin, and the retaining circlips.
Part number A2780302317 designates the Standard Bore size for the M278 engine. If your engine block has been machined or sleeved due to deep cylinder scoring, you must consult with your machinist to determine if standard-size pistons will still fit your new cylinder diameter.
No. If your engine block's Silitec cylinder walls are deeply scratched or gouged (which is the usual reason for replacing M278 pistons), simply dropping in new pistons will not fix the issue. The engine block must be professionally machined and fitted with aftermarket steel or iron sleeves before the new pistons are installed.
Genuine Mercedes-Benz pistons are manufactured to incredibly strict weight tolerances directly from the factory to ensure your V8 runs butter-smooth. However, professional engine builders will typically still verify the weight of the piston and connecting rod assemblies prior to final installation.
Yes, we ship to most countries worldwide.
You can track your order directly through our website by following these steps:
1. Go to the Europarts360 Tracking Page.
2. You will see an option to search by Tracking Number or Order ID.
3. Enter your number in the search bar.
4. Click the "Track" button to view the current status of your shipment.
We offer a 14-day return policy for all unused items in original packaging.
This warranty covers all eligible products purchased through our website for 6 months from the date of purchase.

Almost perfect.

Just wish that I was sent tracking information before I had to ask for it. Delivery and parts were great.

David

United States

Never received items

UPDATE: I DID receive the items. Everything was good. It just took a long time to get a tracking number.

Rebekah

United States

great supplier

great supplier, easy to communicate, great service

Azani

United Arab Emirates

Highly recommend

Managed to find this Genuine Bentley wheel bearing at a large discounted price. How Bentley justify their prices and mark up, defeats me. Will use Europarts again.

David Cliff

United Kingdom

real seller, great comm's

i got my brake pads to audi ceramic system. great price, great seller, 2 weeks in europe[budapest]

Adam Vitez

Hungary

Quick delivery

Quick delivery, good service !

TOR ERIK

Norway

Very helpful

Purchased 2 months ago

Cliff Barros

United States

Great service

Ahmed S.

United Arab Emirates

30% Off

30% Off

30% Off

30% Off

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