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My engine light came on last week and my mate cleared the codes for me, however, engine light came back on after 50 miles or so. 9909 - the output for actuator motor "additional door lock" has a malfunction. there is an open circuit. Some mentioned to me it might be a fuse issue? Any advice or...

Hi mossy I have an error code 9909 also saying that a shot circuit has occurred on my merc too. Just wondered if you got to the bottom of it or did the code clear for good. Mine got cleared but engine light came back on after about 50 miles.

Hi All i have the same creaks as you guys, i did suspect the door rubber seals. However, are you getting any water/rain coming in now you have applied the sticky back felt? Thanks

Hi All i have the same creaks as you guys, i did suspect the door rubber seals. However, are you getting any water/rain coming in now you have applied the sticky back felt? Cheers

For info Mercedes have discovered the noise & it is some of the Hydraulic/oil pipes system when warm & under pressure creates as they said a Howling noise. Apparently they have a data/technical sheet on this issue. They will have to order parts in from Germany up to two weeks wait! At least we...

Thanks people, I will relay this to Mercedes Benz @ Loughborough who I got the car from & they are also taking it in this Tuesday to change a bracket type tensioner mechanism thing for the poly V belt will see what they say. Once again thanks for all the input.

Did you get to the bottom of this noise? I wonder if it is the same noise as I am experiencing with my A170? See my post http://www.mbclub.co.uk/forums/engine/113400-a170-engine-groaning-noise.html

Hi I have just bought a 6 year old Mercedes A170 automatic from my local dealer. Fortunately they gave me a 12 month full Merc warranty on it. The engine when warm makes a groaning/low humming noise which almost matches the engine revs. In other words a slight delay. It sounds like a big belt...