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  Topic Review (Newest First)
04-29-2019 08:05 AM
miko1aj Interesting thread, you learn something every day - I'll check it out next time I take the CLK for a spin.
04-27-2019 04:53 PM
rudeney The fuel door locks and unlocks with the other doors and trunk. If you are in the car with the engine running and the doors are locked, and you only open the driver's door, the other doors (and the fuel door) stay locked. However, if you shut the engine off and open the driver's door, then all doors (including the fuel filler).
04-25-2019 08:27 AM
keyhole
Quote:
Originally Posted by gorj View Post
I have often wondered why the fuel door latch only engages when the engine is started.
I was surprised to read this recent statement, and I doubted that it was so. However, like others here I had never checked it (until today) and I can report that on my 2004 CLK the fuel flap does not lock immediately with the engine running. Maybe later models are different?

Of course, if the cluster is set to 'automatic locking', all the doors, the trunk lid and the fuel flap will all lock after the car reaches 9 mph.

Incidentally, in an emergency you can unlock the fuel flap manually by turning a release knob located behind the right side trim panel in the trunk. This is covered in the Operator's Manual.
04-22-2019 07:51 AM
gorj
Quote:
Originally Posted by keyhole View Post
Over here in the UK, fuel filling stations often have a prominent sign instructing drivers to stop the engine while filling.
I remember seeing signs posted like that here in the US, but have not seen them recently. It has always just made sense to me to turn off the engine. But I live in "bubba" country in Arkansas where they do not do much that makes sense - like drive 4 wheel drive pickup trucks that are two foot off the ground!
04-22-2019 05:39 AM
keyhole
Quote:
Originally Posted by gorj View Post
Switching the ign off while refueling is no so much about causing a fire but it messes with the evap control system.
Over here in the UK, fuel filling stations often have a prominent sign instructing drivers to stop the engine while filling.
04-20-2019 06:23 AM
gorj
Quote:
Originally Posted by IWantedaJag View Post
I've never tried opening it when driving either, although rightly or wrongly I long ago stopped switching the engine off when fuelling. I figure if modern tires conduct well enough to conduct lightning they conduct well enough to dissipate static (even if the engine wasn't running and they didn't it would spark on the pump nozzle and kaboom!) and engine heat is too far away to worry about.
Switching the ign off while refueling is no so much about causing a fire but it messes with the evap control system. I have even seen the check engine light come on after refueling with engine on.
04-19-2019 02:21 PM
rcunningham321 I also like most of the modern touches, but I'm not yet ready for lane departure warning. I've had it on rental cars and it feels like someone else is also driving the car with me - no thanks.

I'll stick with basic 2005 CLK features. One thing that did surprise me on my car was the rain-sensing wiper system. Still don't see that on some more modern cars.
04-19-2019 12:49 PM
IWantedaJag I've never tried opening it when driving either, although rightly or wrongly I long ago stopped switching the engine off when fuelling. I figure if modern tires conduct well enough to conduct lightning they conduct well enough to dissipate static (even if the engine wasn't running and they didn't it would spark on the pump nozzle and kaboom!) and engine heat is too far away to worry about.
04-19-2019 12:01 AM
gorj
Quote:
Originally Posted by Benzyle View Post
Hi Gorj ,
I never knew it locked when the engine is running ,,,,you learn something every day,,,
If it locked when the car was parked (and not locked ) ,,how would you open it to re-fuel ?

When you lock the car ,,the fuel flap locks at the same time...giving you security.
I did not know that. I have never tried to open the fuel door when the vehicle is locked. So the engineers are smart - the door is only open when the vehicle is unlocked and the ignition is off. That makes sense. A 2006 Mercedes has better technology than my wife's 2017 vehicle loaded with all the latest technology, yet you have to pull a lever to open the fuel door!! But I do like the adaptive cruise, the push button start, the navigation, and the lane departure warning in her car.
04-18-2019 11:15 PM
Benzyle Hi Gorj ,
I never knew it locked when the engine is running ,,,,you learn something every day,,,
If it locked when the car was parked (and not locked ) ,,how would you open it to re-fuel ?

When you lock the car ,,the fuel flap locks at the same time...giving you security.
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