Mercedes Benz G550 Technical Service Bulletin #S-54_21-234A Page 81 Date: 101026 Electrical - Aftermarket Tampering Malfunctions
Mercedes Benz G550 Technical Service Bulletin #S-54_21-234A Page 81 Date: 101026 Electrical - Aftermarket Tampering Malfunctions Date: October 26, 2010 Order No.: S-B-54.21/234a Supersedes: S-B-54.21/234, dated July 27, 2010 Group: 54 Revision History Revision Date Purpose a 10/22/10 Additional devices and pictures added. - 7/27/10 Initial issue SUBJECT: MY- All, Models All Malfunctions Due to Other-Make Installations Recent attempts manipulating vehicle mileage through the use of third party electronic devices installed on Mercedes-Benz vehicles are being2010 Mercedes Benz Truck G 550 (463.236) V8-5.5L (273.963) Page 82 reported. There are several CAN manipulation devices on the market. Be particularly aware of two devices which are installed in tandem with the instrument cluster or the EIS (Figure 1) and a circuit board which can be installed directly within the EIS (Figure 2). If vehicle electronics malfunction, control ...