speedometer noisy

my 300 gd does it somtimes and a 124 300 td i had did it also, :evil: anoying especialy when you tell people you would rather have a twenty year old merc than a new one,the wiper relays some times play up in the 124 s ive had thats embarassing when the big front wipper stops where ever it whats

Hi most probably a dry speedo cable..it is a bit labour intensive to rectify.remove the instrument cluster.... unscrew the cable at both ends wash the dead lubricant out with WD 40 from the top end and then drizzle light lube oil into the sheath from the top rotating the drive cable to allow the oil to pass all the way down.another way is to withdraw the cable assembly from the G' remove the inner drive cable from the sheath clean and flush the outer sheath and the drive cable then lube and replace......silence and no erratic indication for another 50.000miles.....

Yes! worn wheels /teeth probably caused by the cable being tight from old hardened lubricant

if you have teeth missing in the unit at the gearbox end of the cable you will require a new unit.......otherwise service the cable as above ..if the cable is frayed you will require a new cable......