Transmission service done, but ........
03-11-2019, 10:43 AM
#401
Member
After exhaustive research on the subject I have concluded 2 things. 1. The my13 and probably my14 722.9+ DOES have a drainplug BUT... 2. It's not actually accessible when assembled. All other threads, videos, diy's, show the plug hole on the bottom of the housing in front (engine side) of the transmission oil pan with a large oval plug and hole. There must have been a redesign because the access hole is now VERY small and rectangular and positioned at the 4 o'clock position of the bell housing. You can remove all the brackets to access the location and you can even use a specialized offset ratcheting bit wrench with a 4mm hex head bit to break the bolt loose. I used a 72 tooth ratchet and was only able to get literally 1 click at a time due to the ignorant deign of the access port. And due to the orientation of the plug to the TC you CANNOT go at it from a straight angle. You're forced to go at it from a 90° angle which severely limits your access. Theoretically you can remove the plug and drain the fluid but if you drop the bolt or the bit you're in trouble and it could possibly require a teardown of the transmission/bellhouse to retrieve it. You might get lucky with a magnetic pick up tool but its VERY risky. The biggest problem lies in the reinstalling of said bolt. There really is no feasible way to start the threading of the bolt for reinstallation. The port is just too tight. I have pictures to show what I'm talking about but it let me upload anything from my phone for some reason. I will continue to try and get the pics posted.
This is what is in place of the previous models TC access port
New location of TC access port (note the size difference and tight working tollerances)
Top arrow shows where bolt is located once TC is properly rotated. Bottom bolt is TC to flywheel bolt (dont touch those)
03-12-2019, 11:53 PM
#402
Senior Member
Don’t worry about the few liters in the TC if it can’t be done safely. A drained TC MAY do more damage for the few seconds running dry than the incomplete change of atf. As you said the risk of dropping something in the bell housing is too high.
I dislike the dealers charging extra $150 to drain the TC.
The so called flushing machine is 17 L and some charge full price — $35 per Liter for the ATF. Dealers using non-Mercedes ATF134FE? at $8/L instead of $30/L get a plus for honesty. The flushing machine one generally don’t change the filter.
the recommended change intervals are 40kmile for the atf134 and 70kmiles for the atf134FE.
I dislike the dealers charging extra $150 to drain the TC.
The so called flushing machine is 17 L and some charge full price — $35 per Liter for the ATF. Dealers using non-Mercedes ATF134FE? at $8/L instead of $30/L get a plus for honesty. The flushing machine one generally don’t change the filter.
the recommended change intervals are 40kmile for the atf134 and 70kmiles for the atf134FE.
Last edited by dave2001auto; 03-13-2019 at 04:08 PM.
11-03-2019, 08:20 AM
#403
Newbie
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E320 (w210) & E220 Wagon (w212)
This is what is in place of the previous models TC access port
New location of TC access port (note the size difference and tight working tollerances)
Top arrow shows where bolt is located once TC is properly rotated. Bottom bolt is TC to flywheel bolt (dont touch those)
Also with engine om651 you need a special tool to rotate the engine from crankshaft, it's not a usual 27mm, but 4 smaller bolts which must be all turned at the same time (can only be done with special tool called (counter holder) which costs 100-150 Euro, some people say rotating the engine can be done with turning PS pulley, it's risky as mentioned in WIS (crankshaft can only be rotated from vibration pulley).
I decided not to drain TC, and service the transmission every 30-40 thousand km instead.
Engine OM651 is differently designed, the tool for rotation is for this engine only.
11-07-2019, 10:53 PM
#404
Senior Member
2013 C250 70K Mile 7 speed transmission service ?
Does anyone know if the 7 speed transmission in a 2013 C250 coupe has a torque converter with the drain plug? From what I read it should have one. I'm asking because I had the transmission service done on October 17th and only got 6 qts of fluid. Beforehand, I asked my SA about the service and if the torque converter was drained. I was told that it will be as part of the service. Did they miss the TC? How much fluid should have been replaced? I'm going to call and ask about it tomorrow. Hopefully I will get a satisfactory answer, but would like to know before calling what the correct answer should be. I have the 2 WIX write ups on the service and TC and will bring them with me if I need to show them what they should have done.
11-08-2019, 12:20 AM
#405
MBWorld Fanatic!
Does anyone know if the 7 speed transmission in a 2013 C250 coupe has a torque converter with the drain plug? From what I read it should have one. I'm asking because I had the transmission service done on October 17th and only got 6 qts of fluid. Beforehand, I asked my SA about the service and if the torque converter was drained. I was told that it will be as part of the service. Did they miss the TC? How much fluid should have been replaced? I'm going to call and ask about it tomorrow. Hopefully I will get a satisfactory answer, but would like to know before calling what the correct answer should be. I have the 2 WIX write ups on the service and TC and will bring them with me if I need to show them what they should have done.
11-08-2019, 12:39 AM
#406
11-08-2019, 10:11 PM
#409
MBworld Guru
The W204 will have the "new" style pan. And you can use an IR thermometer pointed directly at the pan to check the temperature. I have verified on several cars that it matches the reading obtained with SDS.
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xsever (11-09-2019)
11-13-2019, 04:16 PM
#410
Senior Member
I checked with my SA and he asked the guy who worked on my car and was informed that my car was too new to have the drain plug. He said that the drain plug was removed in the 2008 model year. Being that my c250 is a 2013 model year, it does not have the plug. is this correct?
11-13-2019, 06:00 PM
#411
Member
I have the same problem, I think it's only with OM651 engines. But if you remove the oil pump (1st picture) there is another hole at 6 o'clock, it's smaller than other engines.
Also with engine om651 you need a special tool to rotate the engine from crankshaft, it's not a usual 27mm, but 4 smaller bolts which must be all turned at the same time (can only be done with special tool called (counter holder) which costs 100-150 Euro, some people say rotating the engine can be done with turning PS pulley, it's risky as mentioned in WIS (crankshaft can only be rotated from vibration pulley).
I decided not to drain TC, and service the transmission every 30-40 thousand km instead.
Engine OM651 is differently designed, the tool for rotation is for this engine only.
Also with engine om651 you need a special tool to rotate the engine from crankshaft, it's not a usual 27mm, but 4 smaller bolts which must be all turned at the same time (can only be done with special tool called (counter holder) which costs 100-150 Euro, some people say rotating the engine can be done with turning PS pulley, it's risky as mentioned in WIS (crankshaft can only be rotated from vibration pulley).
I decided not to drain TC, and service the transmission every 30-40 thousand km instead.
Engine OM651 is differently designed, the tool for rotation is for this engine only.
