Q&A

 Master

Mercedes use several types of transmissions some have a synthetic fluid that they claimed was sealed for life but "changing the fluid" added longitivity to the transmission but use Mercedes approved oil. Some Mercedes have a fill tube that is at the rear passenger side of the engine compartment but is capped with a tamper proof plug and require a dipstick to check the fluid level. Other transmissions have an overfill plug at the bottom of the transmission, the fluid is checked at a certain temperature and with the engine running fluid should just drip out. Safest bring your car to an independent repair shop that specializes in Mercedes and knows the proper procedure and fluid to use.