These M157 / M278 spark plugs are designed and manufactured for not only high power applications but also factory replacement. The factory plugs do not handle the M157’s high cylinder pressures very well and frequently result in misfire problems, even on unmodified vehicles.
The M157 / M278 spark plugs are also 1 step colder to help prevent pre-ignition in engines that are making more power than stock allowing you to further push the envelope of your vehicle.
Product Overview
A spark plug (sometimes, in British English, a sparking plug, and, colloquially, a plug)
is a device for delivering electric current from an ignition system to the combustion chamber
of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark,
while containing combustion pressure within the engine. A spark plug has a metal threaded
shell, electrically isolated from a central electrode by a ceramic insulator. The central
electrode, which may contain a resistor, is connected by a heavily insulated wire to the
output terminal of an ignition coil or magneto. The spark plug's metal shell is screwed
into the engine's cylinder head and thus electrically grounded. The central electrode
protrudes through the porcelain insulator into the combustion chamber, forming one or more
spark gaps between the inner end of the central electrode and usually one or more protuberances
or structures attached to the inner end of the threaded shell and designated the side, earth,
or ground electrode(s). M157/ M278 spark plugs are designed and manufactured for not only high
power applications but also factory replacement. The factory plugs do not handle the M157's
high cylinder pressures very well and frequently result in misfire problems, even on unmodified
vehicles. The M157/ M278 spark plugs are also 1 step colder to help prevent pre-ignition in
engines that are making more power than stock allowing you to further push the envelope of your vehicle.
Key Features
-
Higher Output for High Boost Applications
-
Colder range for better performance with increased horsepower levels
-
Direct replacement / bolt in for M157 / M278 engines
-
Suitable for all M157 / M278 vehicles from stock to highly modified
-
Set of 8
General Information
| Manufactorer: |
NGK |
| Model Name: |
Spark Plug Set |
| Color: |
Silver, White |
| Model No: |
M157 |
Specifications
| Key Width: |
14 mm |
| Thread Diameter: |
12.0 mm |
| Thread Length: |
26.5 mm |
| Electrode Distance: |
1 mm |
| Resistance: |
Generated, 1KOhm |
| Type: |
Laser Iridium |
* Important: Please be sure to check and set spark plug gap prior to installation.
Vehicle fitment
- 2011-2014 Mercedes-Benz CL500 Coupe
- 2011-2014 Mercedes-Benz CL550 Coupe
- 2011-2014 Mercedes-Benz CL63 AMG Coupe
- 2011-2017 Mercedes-Benz S500 Base
- 2011-2017 Mercedes-Benz S63 AMG Base
- 2011-2018 Mercedes-Benz CLS500 Coupe
- 2011-2018 Mercedes-Benz CLS63 AMG Coupe
- 2011-2018 Mercedes-Benz CLS63 AMG Shooting Brake
- 2012-2015 Mercedes-Benz GL63 AMG Base
- 2012-2015 Mercedes-Benz ML500 Base
- 2012-2015 Mercedes-Benz ML550 Base
- 2012-2015 Mercedes-Benz ML63 AMG Base
- 2012-2016 Mercedes-Benz E500 Base
- 2012-2016 Mercedes-Benz E500 Cabrio
- 2012-2016 Mercedes-Benz E550 Base
- 2012-2016 Mercedes-Benz E63 AMG Base
- 2012-2017 Mercedes-Benz E550 Cabriolet
- 2012-2017 Mercedes-Benz E550 Coupe
- 2012-2017 Mercedes-Benz G63 AMG Base
- 2012-2017 Mercedes-Benz S550 Base
- 2012-2018 Mercedes-Benz CLS500 Shooting Brake
- 2012-2018 Mercedes-Benz CLS550 Coupe
- 2012-2019 Mercedes-Benz SL63 AMG Roadster
- 2012-2020 Mercedes-Benz SL500 Roadster
- 2012-2020 Mercedes-Benz SL550 Roadster
- 2013-2014 Mercedes-Benz GL450 Base
- 2013-2015 Mercedes-Benz G63 AMG 6x6
- 2013-2015 Mercedes-Benz GL500 Base
- 2013-2015 Mercedes-Benz GL550 Base
- 2013-2016 Mercedes-Benz E500 Coupe
- 2013-2016 Mercedes-Benz E500 T-Modell
- 2013-2016 Mercedes-Benz E63 AMG S 4Matic
- 2014-2017 Mercedes-Benz S550 Coupe
- 2014-2017 Mercedes-Benz S63 AMG Coupe
- 2014-2018 Mercedes-Benz CLS63 AMG S 4Matic
- 2015-2017 Mercedes-Benz S63 AMG Cabriolet
- 2015-2019 Mercedes-Benz GLE63 AMG S Base
- 2015-2019 Mercedes-Benz GLE63 AMG S Coupe
- 2015-2019 Mercedes-Benz GLE63 AMG Base
- 2015-2019 Mercedes-Benz GLE63 AMG Coupe
- 2015-2019 Mercedes-Benz GLS500 Base
- 2015-2019 Mercedes-Benz GLS63 AMG Base
- 2016-2018 Mercedes-Benz GLE550 Coupe
- 2016-2020 Mercedes-Benz GLE500 Base
- 2016-2020 Mercedes-Benz GLE550 Base
- 2017-2019 Mercedes-Benz GLS550 Base
Installation manual
Weistec part number: 01-157-00727-0 · UPC: 810089561411
All products are shipped out from one of the Signature Autohaus shipping locations. Signature Autohaus drop ships some products and ships direct others. All products are shipped via FedEx, UPS, DHL or another qualified shipping carrier.
Special arrangements may need to be made for international orders and oversize packages.
In the event a product arrives damaged to your location, please follow the steps listed below. All damaged items must be reported to the shipping carrier immediately and you must notify Signature Autohaus within 5 days of receiving your order. If these steps are not followed, your shipment may not be able to be a candidate for a claim.
Complete the Shipping DAMAGE Claim Form by contacting the carrier that delivered your package.
1) Keep the product and its original packaging and box
Make a list of the damaged or lost item(s)
2) Signature Autohaus will contact the shipper once we receive the email info above to schedule a pickup, DO NOT send it back to us
3) Once the product is picked up and inspected by Signature Autohaus and or Supplier, a replacement or credit will be issued.
4) The Shipping Rates shown at time of checkout our dimensional rate only. If your shipment weight is to much then contact us for a shipping quote. If there is an error in the shipping rate quoted we will contact you and let you know of the changes. International orders(Outside the USA) are not automatically processed as we may require additional information from you.
If a product is ordered and not wanted, the UNUSED item can be returned for a 35% restocking fee. Shipping is not refundable in either direction. All items wanting to be return MUST be reported within 30 days of the original invoice date. No items will be returnable after 30 days. All products shipped from the Signature Autohaus warehouse are shipped via FedEx or Freight and require a signature when delivered. Some packages shipped from the manufacturer may or may not require signatures for package release. Fedex, UPS, and DHL have package pick up locations if you are unable to sign for the package. If the package is returned to Signature Autohaus or manufacturer, you will be responsible for the return shipping costs and pay a 35% restocking fee. These fees will be charged to your account on file.
SIGNATURE AUTOHAUS DOES NOT REFUND SHIPPING CHARGES. If you modify, install, or alter the item in any form, we cannot accept it as a return, will not cover any expenses related to the product or installation, and you maybe be required to purchase a replacement.
In the event that the product you ordered is sent either incorrectly or processed wrong by Signature Autohaus, we will arrange for the package to come back to us and ship out a replacement. We will evaluate the situation before we determine the shipment was incorrect.
To return a item back to us, please do the following:
1. Contact our Customer Service Department to receive a RMA number. All packages returned without a Returned Merchandise Authorization number will be refused.
2. Package the item up in original packaging unless deemed unuseable
3. Include the UNUSED parts and any additional information that was included
4. Include a copy of your receipt
5. Write a brief description of the problem with the product
6. If you have a receipt for the return shipping include as well
7. We DO NOT accept any freight collect packages
8. Once we have received the above information we will notify you via email or phone and let you know the status.
