W1ghty
MB Enthusiast
It’s a cold weather thing , the car does it on purpose to heat more quickly. Nothing to worry about
My car has only recently started doing it. I've owned it for over 3 years, driven it at all year round, and this was never an issue until this winter.
Last summer I had a transmission pan leak issue which I replaced with a fluid and filter change. So I thought maybe I was slowly losing fluid again but there is no obvious leaks, everything looks dry.
W1ghty
MB Enthusiast
Can’t advise more than that . My cars hold the lower gear and refuse to change higher for a couple of hundred metres when it’s cold .
Hopefully some else will have an idea .
Thanks W1ghty, much appreciated. What I am experiencing feels different than the car holding the gear. It is more like the revs go up but no torque is transmitted to wheels, like revving in neutral for 1-2 seconds. Then everything engages and the car starts moving.
W1ghty
MB Enthusiast
Yep that does sound different . Hopefully someone will help soon buddy .
- Joined
- Feb 8, 2007
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- Portsmouth, Hampshire.
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- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
Check the level firstly. It sounds a little low.
My car does not have transmission dipstick. Is there another way of checking it without a specialist tool?
+1 for low fluid, expanding as it heats up. One of mine started flaring occasionally like this. It slowly got worse so I had a look underneath. A corrosion pinhole on one of the ATF pipes was letting small amounts of fluid out. Changed it and filled it up -all good.
Can't help on the filling issue though. Different gearboxes need different techniques, and if it is low there's a reason which needs investigating.
Can't help on the filling issue though. Different gearboxes need different techniques, and if it is low there's a reason which needs investigating.
boxer 01
Active Member
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- Oct 23, 2009
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- 322
- Car
- w211 e320cdi sport g7 with paddleshift
I'm afraid the only way to check level is by removing the drain plug and looking at the oil flow when gearbox temperature is at 45 deg. Have a look at this thread.
Post in thread 'Checking ATF level on 722.9 7g+' Checking ATF level on 722.9 7g+ | Parts, Maintenance & Servicing
Looks like booking it in for diagnosis with my specialist is the only option.
boxer 01
Active Member
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- Oct 23, 2009
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- w211 e320cdi sport g7 with paddleshift
Why don't you try the gearbox reset procedure, although there are conflicting views on this. I've tried it a few times and it seemed to work.
resetting the 7G-Tronic gearbox auto learning. - MBWorld.org Forums
C-Class (W204) - resetting the 7G-Tronic gearbox auto learning. - Can't find the thread about this, remember reading the procedure and something about the 1st two gears. Heres my experience with it. The car was very smooth and changes at about 2000 revs lightfoot. I recently took it for 20 000Km...
mbworld.org
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