Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on April 14, 2017.
As of Friday, May 30th, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Part Number
See PDF

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-691-1
  • Executive Order 691-1 / D691-1
  • ARB # D-691-1
  • Executive Order No: D-691-1
  • C.A.R.B. No. D-691-1
  • Resolution D-691-1
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-691-1 PDF

D-691-1 Document:

CARB_D-691-1

State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—691—1 Relating to Exemptions Under Section 27156 of the California Vehicle Code Weistec Engineering M157/M278 Tune Pursuant to the authority vested in the Air Resources Board by Section 27156 of the Vehicle Code; and Pursuant to the authority vested in the undersigned by Section 39515 and Section 39516 of the Health and Safety Code and Executive Order G—14—012; IT IS ORDERED AND RESOLVED: That the installation of the M157/M278 Tune, manufactured and marketed by Weistec Engineering, 1266 North La Loma Circle, Anaheim, California 92806, has been found not to reduce the effectiveness of the applicable vehicle pollution control systems and, therefore, is exempt from the prohibitions of Section 27156 of the Vehicle Code for the following 2011 to 2017 model year Mercedes—Benz turbo vehicles equipped with a 4.7L or 5.5L gasoline engine, as listed in Exhibit A. The M157/M278 Tune is a new ECM calibration designed to increase the overall performance of the twin turbo 4.7L or 5.5L gasoline engine. Modifications to the ECM are conducted by Weistec Engineering only, there are no user adjustments. This Executive Order is valid provided that the installation instructions for the M157/M278 Tune will not recommend tuning the vehicle to specifications different from those of Weistec Engineering Changes made to the design or operating conditions of the M157/M278 Tune, as exempt by the Air Resources Board, which adversely affect the performance of the vehicle‘s pollution control system shall invalidate this Executive Order. This exemption is issued based on submitted emissions test data, from the SEMA Garage, Diamond Bar, California, on a 2013 model year 5.5L Mercedes C63, certified to the LEV II ULEV PC emission standards and tested using the Cold—Start CVS—75 Federal Test Procedure (FTP) test cycle, Highway Fuel Economy Test (HWFET), and the Supplemental Federal Test Procedure (SFTP USO6/SC03 (AC2 test + 20%)) test cycle.

CVS—75 FTP NMOG CO NOx HCHO Standards (UL) 0.055 2.1 0.07 0.011 Device Test 0.035 90.5 0.04 0.001 (w/ df applied, 2 test avg) USO6/SC03 NMHC+NOx cCO Standards 4k 0.14/0.20 8.0/2.7 Device 0.05/0.04 1.210.2 HWFET — NOx Standard (UL) 0.09 Device w/df 0.05 Horsepower gain was measured at 123 hp Test results showed that the M157/M278 Tune when installed on the vehicle did not cause exhaust emissions to exceed the applicable emission standards during the FTP and SFTP. This Executive Order is also based on the On—Board Diagnostic II (OBD II) testing conducted on the same test vehicle. The M157/M278 Tune when installed on the test vehicle did not affect the vehicle‘s ability to perform its OBD II monitoring. The Air Resources Board reserves the right in the future to review this Executive Order and the exemption provided herein to assure that the exempted add—on or modified part continues to meet the standards and procedures of Title 13, California Code of Regulations, Section 2222, et seq. THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OF ENDORSEMENT BY THE AIR RESOURCES BOARD OF ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE M157/M278 TUNE. No claim of any kind, such as "Approved by the Air Resources Board", may be made with respect to the action taken herein in any advertising or other oral or written communication. Violation of any of the above conditions shall be grounds for revocation of this order. The order may be revoked only after a ten—day written notice of intention to revoke the order, in which period the holder of the order may request in writing a hearing to contest the proposed revocation. If a hearing is requested, it shall be held within ten days of receipt of the request and the order may not be revoked until a determination is made after the hearing that grounds for revocation exist. Executed at El Monte, California, this / 1 day of April 2017. H. r(fi‘%nnefie Hebert, Chief Emissions Compliance, Automotive Regulations and Science Division WEISTEC ENGINEERING — M157/M278 TUNE — D—691—1

Exhibit A Part # Engine Desc. MY Model 2017 GLS 550 4MATIC 2013—17 SL 550 101217 E 550, 4MATIC, Conve'rtible, Coupe 01—278—00828—6 4.7 Turbo Gas $ 550, 4MATIC, Convertible, Coupe, W 2011—17 CL 550 4MATIC 2013—16 GL 550 4MATIC 2013—15 ML 550 4MATIC 2013—14 GL 450 4MATIC 2017 AMG GLS 63 AMG CLS 63 S 4MATIC 2016—17 AMG GLE 63, S, Coupe AMG S 63 4MATIC, Convertible, Coupe 2013—17 SL 63 AMG 2016 AMG E 63 4MATIC, S, Wagon 01—157—00252—3 5.5 Turbo Gas 2016 AMG G 63, GL 63 2015 CLS 63 AMG S 4MATIC 2013—15 G 63 AMG, GL 63, ML 63 2012—15 E 63 AMG, S, Wagon, 4MATIC 2011—15 S 63 AMG, 4MATIC, Coupe 2012—14 CLS 63 AMG, S 2011—14 CL 63 AMG WEISTEC ENGINEERING — M157/M278 TUNE — D—691—1



Document Created: 2017-07-13 16:41:14
Document Modified: 2017-07-13 16:41:14

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