Mercedes-Benz Archives - UnderhoodService
Mercedes Ignition Coil Pack Diagnostics

Replacing a single coil might not be the best approach to curing an engine of a chronic misfire.

Mercedes EQS Service Opportunities

EQ is the EV brand for Mercedes. It is the equivalent of Audi’s Etron or VW’s iD brands.

Mercedes-Benz Saddlebag Fuel Tanks (VIDEO)

Let’s discuss how fuel systems operate on Mercedes-Benz vehicles. This video is sponsored by Carter.

Mercedes-Benz HD Projector Headlights: The Next Headlight Innovation

Mercedes-Benz is working on the latest generation of headlights that could change the way we drive at night. This new technology turns headlights into digital projectors that not only project light, but also images to aid the driver and pedestrians.

Must-Read TPMS Technical Service Bulletins

Here’s a rundown of the top technical service bulletins related to TPMS. These TSBs should be analyzed by every technician that services TPMS. Audi TSB Number: 4413382034445/1 Models: 2010-’14 A4/S4, A5/S5 and Q5 Summary: This TSB addresses TPMS MIL lights that are not related to a loss of pressure. The TPMS light may illuminate if

Emissions Codes: Mercedes-Benz Case Study

The Malfunction Indicator Light (MIL) has been around for more than 25 years, but since OBD II standards made the electronic monitoring of emissions mandatory, that light has been given new life. In Washington state, the emissions test procedure for OBD II cars makes control of the MIL an integral part of the test procedure.

Mercedes-Benz Auxiliary Water Pump Diagnostics

A Mercedes comes into your shop with a complaint of poor heater performance. The driver says on cold mornings the heater will blow cold during the drive to work in rush hour traffic. The car is not overheating and the air is coming from the ­correct ducts. Your first reaction might be to install a

mercedes benz water pump