W203 Sam Module
Leanne Wittlin
There is an ABS control module that reads the information from various sensors on the vehicle and controls brake modulation. If this control module goes bad it can cause all kinds of problems with your braking system.
Using an E6 reverse Torx remove the four screws securing the module to the front of the unit. Pull the module straight back and off the unit. With the module off, unclip the harness and rotate the cover up. This will release the harness from the module.
This gear selector will cause problems preventing selection of any forward or reverse gears until the ignition is cycled. The gear selector position will not be recognised on the gear display or will show incorrectly. If the vehicle is in gear when the gear selector module fails you will find that you are not able to select park (P), again until the ignition is cycled.
There will be no warning lights when the gear selector lever fails but there will be fault codes stored, scanning the vehicle with diagnostic tools will reveal these as selector lever position detection failed and CAN signal selector lever position.
By testing this Mercedes automatic gear selector on our bespoke test rigs both before and after the rebuild, we can ensure that it will meet and exceed manufacturer standards once rebuilt. We only use higher rated than standard OEM components.
We have been testing and rebuilding these gear selector levers for many years for owners, garages and specialists around the globe and we are very proud to be able to supply our unlimited mile lifetime warranty with all of our rebuilds. Our very high standards reflects in a work defect rate lower than 0.29% across every rebuild and replacement that we ship out.
Once received we will test, rebuild and return your gear selector lever with an unlimited mileage lifetime warranty. (if your unit turns out not to be faulty then we will refund your payment less a small testing fee and return shipping)
Once received, we will test your selector lever and call you to advise on the outcome of testing, if your unit is faulty and you choose to go ahead with the rebuild then we will take payment over the phone using a debit/credit card.
All of the above can cause memory loss to the EIS module and cannot be repaired or re-flashed using the Mercedes STAR diagnostic system. At this point, you would have been advised to purchase an extremely expensive new unit when working out the total bill with programming and labour inclusive of VAT.
After we have repaired your EIS module, you will be able to insert the key, turn the key and start the vehicle without trouble. However, we recommend that you check the battery supply voltage and wiring to the EIS unit before installation to ensure there are no faults on the vehicle that could potentially cause the failure of the replacement / repaired unit.
In the world of automobiles, Mercedes Benz is a renowned brand famous for its production of high-performance vehicles. Driving one of their models guarantees the owner a sense of luxury and exceptional craftsmanship. Besides being a high-end vehicle, Mercedes-Benz is also a prestigious symbol of elegance.
There are times when even high-quality vehicles may have problems. In a Mercedes-Benz, a malfunctioning Transmission Control Module (TCM) can cause not only a difficult ride but also substantial damage to the vehicle.
The operation of a vehicle is dependent on a number of components that work together to enable you to move from one point to another. Although the engine is directly responsible for moving the car forward, the transmission control module controls the various gears that provide a unique Mercedes driving experience. Through sensors, the TCM system collects and processes data that determines when and how gears can be changed. Simply put, the transmission control module determines the speed of your car.
The engine control unit provides the data the control module needs to automate gear changes. Transmission control modules ensure smooth gear changes and improve fuel efficiency by enabling gear changes. By sending and receiving signals from its sensors to the lock-up clutch, the transmission control module adjusts fuel injection into the engine and allows it to run more efficiently.
Most vehicle components wear out over time, which is another cause of transmission control failure. TCMs are electronic components, so any wear in the wires that transmit voltage will negatively affect the output of the TCMs.
Electrical issues in your vehicle, corrosion buildup, vibration, stress, or natural wear and tear can lead to transmission control modules failing. Mercedes-Benz owners should seek a specialist as soon as possible if they notice any of these signs or symptoms:
Some Mercedes Performance enthusiasts have run into issues when the ECU is tuned but the Mercedes CPC Module is not tuned to match. What can happen is the vehicle will trip the CPC restriction, forcing what is called limp mode while driving. The purpose of limp mode is to protect you in the event that certain conditions have rendered it unsafe to operate your Mercedes-Benz at its normal level of performance. Its goal is to get you to your Mercedes-Benz mechanic safely, without further damaging any engine components on the way to the workshop. This can be quite frustrating when you are trying to get the most out of your vehicle!
Eurocharged Engineers have developed the methods to tune the Mercedes CPC Module to work perfectly with our ECU performance software. We first would send you a blank CPC module to install into your vehicle. This is a very simple process, and we can walk you through the install when needed. Then, using our state-of-the-art tuning OBD equipment, we would remote in and flash/tune the new module allowing for our ECU parameters to take full effect. This will then allow the following enhancements:
Eurocharged Performance, offers many different services in its exclusive and well maintained facilitates all around the world. Everything from the basic bolt on to a monster street / strip car, we have what you are looking for!
Correction
In the early model years, you could replace the SAM unit with a used SAM from another Mercedes-Benz and not worry about any programming. Newer Mercedes-Benz models require SAM module programming and the new SAM unit will need to be coded with the Sofware Calibration Number (SCN). You will need to replace it with a new one if you need a SAM. The new SAM module will need to be coded and programmed using the Star Diagnostic System (which we have at AMC) once it is installed.
The Proper Repair
The only true and permanent repair is to replace the SAM module and carry out programming, being certain that the cause of the failure, water entry, or other, is corrected.
Put simply, the transmission control module is basically a computer which communicates information to other computer systems within the vehicle. It is vital to your car running properly.
A bad TCM can cause other issues when it does not mix the fuel-to-air ratio properly. This may affect your Mercedes responsiveness a great deal and can cause it to jump forward without notice. If you cannot anticipate the acceleration or deceleration of your vehicle while driving, the situation can become very dangerous. It is best to seek immediate attention from a licensed mechanic to get to the bottom of the issue.
If your module is completely compromised and reprogramming is not working, it may be time to replace the TCM. This method requires parts and some extra labor. Below are some advantages and disadvantages of replacing a TCM.
There are many vehicle components that work together to make it possible for you to move from point A to point B. While the engine is directly responsible for moving the car forward, the transmission control module is responsible for the different gears that make your Mercedes driving experience unique. It does this by collecting and processing data using sensors that then determine when and how you can change gears. In a nutshell, the transmission control module is responsible for the speed at which you can drive your car.
The data that the control module uses to enable automation of gears is provided by the engine control unit. By enabling the switch between gears, the transmission control module not only ensures a smooth transition between gears, it also improves fuel economy. This is made possible when the Transmission Control Module, or TCM, receives and sends signals from its sensors to the lock-up clutch allowing it to adjust fuel injection into the engine for efficient fuel use.
The transmission control module in your car is an electrical component. This means that it is prone to voltage overload. The voltage overload can be on account of a short in the actuator circuit or in the solenoid. This overload can also be due to water getting into the circuits, shorting them. Low or no voltage supply to the module makes it impossible for the transmission control module to correctly compute data, causing a myriad of problems.
Another reason for transmission control failure is the usual wear and tear that most vehicle components suffer over time. Because the TCM is an electronic component, any wear in the wires through which voltage is transferred will directly affect the output of the TCM, negatively affecting your driving experience.
Other than a hesitation in acceleration, your Mercedes will also develop shifting problems such as slipping into a neutral gear without any warning, or you may have trouble either getting it out of the neutral gear or shifting out of a lower gear. You may also notice your car shifting involuntarily from one gear to another or erratic acceleration when driving uphill.
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