Best Practice when driving a 7G DCT vehicle? - Mercedes-Benz Forum
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post #1 of 3 (permalink) Old 03-10-2016, 06:40 PM Thread Starter
BenzWorld Junior Member
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Question Best Practice when driving a 7G DCT vehicle?

I am looking for advice regarding ‘best practice’ when driving a vehicle with a duel clutch transmission and in particular the 7G DCT as fitted to Class A and B Mercedes Benz vehicles.
For instance, in city traffic is it better to just leave it in drive all the time while waiting at traffic lights like you would if driving an automatic; or is it better to flick it into neutral if you’re expecting to be stationary for a while, like you would do if driving a manual vehicle?
By ‘best practice’ I mean what’s best for the longevity of the clutches and the associated equipment; dose this stuff wear more when left in drive while stationary or dose shifting into neutral then back to drive regularly cause more wear?
I can definitely hear some load come off the engine when I go from D into N when stationary.
As you would have gathered I drive with the Eco mode turned off, otherwise this question wouldn’t be so relevant.
With my manual vehicle I always downshift as I’m slowing down to a stop and would often not use the brakes until the last ten meters, I’m not talking aggressive double shuffle stuff here, just simple downshifts to use the engine breaking effect to slow down. The paddle shifts on the steering wheel make this very easy but is this bad practice with a DCT?
I’m hoping for feedback from someone with a real working knowledge of the Mercedes 7G DCT; a service technician would be great.
I have read that the clutches of the 7G DCT are 'oil cooled’ but I don’t know if this means they are a ‘wet clutch’.
Finally, dose anyone out there drive their 7G DCT in Manual mode on a regular basis?
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post #2 of 3 (permalink) Old 10-05-2017, 01:11 AM
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My name is Vikram, I reside in South of India, I own a A180 Petrol.

The clutch is wet and every 60,000 kms the transmission oil is scheduled for a change, I am at 42,000 Kms on the odo.

Wrt driving modes I usually drive in D mode, only hard highway overtaking I use the downshifts (-) and then go back to the gears.

Putting the car in neutral is a good practice in longer traffic jams in a straight surface, as you rightly said it does put the load on the hold button in the eco mode or just holding the brakes for longer time can heat up the brakes... ideally in an auto there is a self defense technique even if u hold the brakes it dosent harm not sure if its a myth or a real thing.

do keep writing to me thanks take care.
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post #3 of 3 (permalink) Old 06-14-2018, 08:09 PM
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I am not a technical person and new to the forum and Mercedes (joined yesterday, acquired A200 last week). While browsing the user manual, I read that Mercedes does not recommend using the gears (so paddle shift down for automatics) for first 1500km while running in (although my agent actually told me no need to run in modern cars!). I interpret this to imply that downshifting to break should be OK thereafter? However, that's probably an over-simplification and I'm sure a technical person could confirm/deny/elaborate...
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