V Class Malfunction Warning on Display

[Dunny99]

Hi. Newbie here. I recently purchased a 2017 V-Class V250D. The car has developed a warning that comes up on the display when the car is turned on - it can be cancelled by pressing OK. The warning, in Yellow, is a picture of a bulb and the message reads ‘Malfunction See Owners Manual. I have downloaded the online manual (very poor - another annoyance) which tells me that with an external bulb is out (I have checked them all) or I have a problem with the Trailer Hitch and the check the fuses to do with this. The vehicle does have a removable (untested) trailer hitch and electrics. I have found all of the fuse locations relating to ‘Trailers’ but there are no fuses in their locations. Any ideas Please?

 

[Wearsthefoxhat]

Hi, have you changed, replaced any of the lamps as that may cause a fault. Not sure regarding the V class but previous MB’s have had two brake light lamps (bulbs) so appear to be working but one is out…though think that most lamps are led.

 

[Dunny99]

Thank you for your replay. The lights are mainly LED and I have checked the rigorously. Also, i believe if it is a specific light then the warning would tell me so. I think I will have to bite the bullet and take it to Mercedes or an Auto electrician.

 

[Wearsthefoxhat]

You could remove a lamp and see if the display gives you that one or just the warning. We have a 2019 V220, there are a lot of lamps.
probably a good idea to find a good MB indie to resolve this and possibly carry out the servicing too.

 

[wrdcc01]

Have you got any signs of water ingress into the headlamps, tail lamp clusters? Could just be a little bit of high resistance in a lamp holder or LED harness connection. The non specific lamp warning message could be because all the lamps are working but something is not within tolerance.