Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, my name is Jose Sebastian, your mechanic automotive expert, and I will be happy to assist you today. In some cases, I may need more information to assist better. I apologize for any delay.
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Dear customer, in the boot of the Mercedes is the SAM unit, this unit is in charge of the vehicle's electronic systems, there is the one that is producing noise, I would like to know if apart from the noise you have some type of failure or interference or if you simply are you just hearing that click?
Regarding the reverse delay to apply due the year of your Mercedes it is unlikely that you are having transmission failures, most of the reverse gears are slow since the reverse transmission ratios are much lower than the ratio of the first gear, therefore i considered that it is very likely to be normal but since you are not used to Mercedes it is normal that you notice a difference, so do not worry.
The transmission oil would be a reason, but first, What is the mileage or your Mercedes?
Dear customer, the car should have had already its first transmission maintenance. Therefore, it is good that at this time you do the replacement of the transmission filter oil, when maintenance is not done in time, certain failures may occur as a problem in the start in this case the reverse can delay a bit, therefore it may not be normal that small delay but simply that the oil no longer has a good viscosity therefore there is a delay in the response of the reverse selenoid.
On the other hand, the sound if can be normal there are some SAM units that are a bit noisy. Anyway, it is good to see if in the SAM unit, one of its relays or fuses is clicking when activating P or D.Do you understand me dear customer?
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