My 2019 E450 Cab has an annoying tick-tick-tick noise when driving. The speed of the ticking is directly proportional to the speed of the car. It has done this for at least the last nine months.

I looked for any rocks stuck in the tread of the tires and didn’t find any that were protruding. Just had my first Service A yesterday and asked them to take a look at the tires and the wheels while the car was up in the stirrups.

They said the found nothing wrong (go figure) and they gave me a cockamamie “possible explanation” that I’m hearing the advanced fuel injector. That it will make a ticking noise and that the ticking pace matches the speed of the car.

I call BS. I find it hard to believe MB makes a fuel injector that deliberately makes noise outside the car.

But... I figured I’d post here on the 1 in 1,000,000 chance everybody comes back and tells me it’s normal

 

That sounds like the advice of a W210 member I refer to as polka *****-----hum fuel injector noise that is original---in any event I would talk with the service manager and say WTF put the car on a lift find the tick tick

 

Have dealer revisit, request SA get shop foreman or lead tech involved to compare your vehicle to a comparable one side by side.

 

Never noticed this on my E450 Cab. I'd say Abby Normal. Bring it back to dealer.

 

Hi all! We also have this issue on our 2021 E450 Cabriolet. The car has a ticking noise that can be heard on both sides of the car that is speed dependent. It is easiest to hear when near a curb or fence that the sound can bounce off of.

MB service looked at it and changed brake rotors but didn't remove the sound. Now they are saying it is a "normal" noise when they test drove another E450 Cabriolet. We asked to to test drive that car but it is unavailable because it is sold.

I can't imagine MB has purposefully created a ticking part on a convertible!

 

If the sound is normal as the dealer claims, then why did they change the brake rotors???????

Obviously rhetorical question.

Of course a ticking sound is not normal. Glad that the dealer has acknowledge the sound. Most of the time they deny hearing it.

In any event, depending on how much the sound bothers you and how much time you want to put into it, I would take my car back to the dealer, get a loaner and tell them to call you when they have eliminated the sound.

Failing that a call to your regional MB would be in order.

 

Rock or nail in the tire.

 

Rock or Nail in the tire has already been ruled out. Plus, the sound has been there since we bought it about 6 months ago. We just raised the issue during some recall work that was being done.

 

On my S211, every time I had my tires changed, I'd have to warn the shop to be mindful of brake dust shields/guards. Inevitably, after the swapping, there'd be one-per-rotation chirping or other such noise. To fix the issue, they'd just manually grab what I assumed were the guards and give them a shove. That did the trick.

I don't know if this could be an issue on the 213, but mention it just in case.

 

Thanks for the tip! We'll try it!