PCM And CAN Bus Communication Diagnosis
Although CAN bus was introduced by Mercedes-Benz during the early 1990s and adopted by many European manufacturers, many domestic and Asian auto manufacturers waited until the 2004 model year to introduce CAN bus in their lower-end, bread-and-butter vehicles.
Arnott Introduces New Rear Shock For 2005-’11 Mercedes-Benz ML-Class And 2007-’12 GL-Class
The Arnott shock replaces the worn OE shock and includes a sensor to bypass and turn off ADS dashboard warning lights.
Mercedes-Benz Tech Tip: Convertible Top Inoperative
Found the convertible top hydraulic pump motor was running, but the top did not move. Connected a scan tool to check for codes and found no codes were displayed. Attempted to lower the top with a scan tool – got the same results.
Mercedes-Benz TPMS Service
On different Mercedes-Benz models, you will see two types of TPMS systems. Low-line systems do not display individual tire pressures. These systems just monitor inflation and alert the driver if there is an underinflation or overinflation problem with one antenna. Mid-line systems display the individual pressures, and some systems have four antennas mounted near the wheel wells.
Tech Tip: Mercedes-Benz Cylinder Head Cover Leak
Field inspections of suspected cylinder head cover oil leaks have revealed that unnecessary resealing is being performed when the cylinder head cover is not the root cause of the leak. In cases of customer complaints of oil leakage, it is essential to determine the actual source. A proper remedy should be applied to avoid repeat repairs and unnecessary shop visits.
Mercedes-Benz AIRMATIC Suspensions
The Mercedes-Benz AIRMATIC suspension system was introduced in 1999 on the S-Class and has subsequently been used on the E-Class and most of the automaker’s SUVs. The system employs electronically controlled air springs that provide an ideal balance of ride comfort and handling.
Mercedes-Benz Hydraulic Suspension: Dos, Don’ts And Did-You-Knows
It doesn’t seem that long ago when the closest we came to any kind of active suspension on a Mercedes-Benz was the self-leveling rear suspension systems on the station wagons and 560 models (SEL sedan and the SEC coupe). Of course, there were some exceptions – European models and the 450SEL 6.9 starting in the late ’70s were available with hydraulic suspension at all four corners.
Import Oil Specification Primer
As engine technology has evolved and fuel efficiency standards have tightened, oil specs have increased in importance. Using the wrong viscosity could set a fault code in some applications or interfere with the normal operation of the variable valve timing system. VVT engines not only require a specific oil viscosity, but also require an oil that keeps the pulse-modulated variable valve timing solenoids clean, lubricated and free of small air bubbles.
Steering System Calibrations
Today, potentially any make or model rolling into your shop could have some type of stability control system that requires recalibration. These systems are no longer exclusive to luxury or premium models since stability control on most vehicles was mandated for 2012 models. Some technicians started to see steering angle sensors on vehicles in the 1990s when Mercedes and BMW got in the game.
Beta Introduces Impact Sockets For Mercedes-Benz Vehicles
Beta Tools #720MRC Impact Sockets for Mercedes-Benz are 1/2″ drive and have a polymer sleeve for non-marring performance when removing lug nuts with the flower-design on Mercedes-Benz vehicles.
Mercedes-Benz: Refrigerant Compressor Noise Complaints
If you receive customer reports of noises at the refrigerant compressor with the A/C either activated or deactivated, the cause could be a defective belt pulley or belt pulley bearing.
Diagnosing And Servicing Active Motor Mounts
Engine vibration is usually most noticeable when the engine is idling, especially if the engine has an odd fire configuration as some V6 engines do. Four cylinder engines, as well as diesels, can also produce a lot of vibration at idle. Vibrations can be amplified even more when high-load belt-driven accessories, such as the A/C compressor, are engaged while the engine is idling.