Engine noise

Asked by Feb 22, 2018 at 10:01 PM about the 2007 Mercedes-Benz M-Class 3.0TD ML320

Question type: Maintenance & repair

I have popping/whistling sounds when engine
running from the top left hand side of engine around
the injectors also in the same are black oily carbon
deposits, any ideas

1 Answer


It could be several things – an injector, exhaust manifold gasket failing or some Merc 6 cylinder engines do have a problem with noise from cylinder number one. If you're worried I'd take it to a Mercedes specialist for full diagnosis.

Your answer:

Mercedes-Benz M-Class experts

Related models for sale

Land Rover Range Rover Sport for sale
115 Great deals out of 2,643 listings starting at £4,490
Mercedes-Benz GL-Class for sale
6 Great deals out of 82 listings starting at £10,000
Mercedes-Benz E-Class for sale
337 Great deals out of 3,812 listings starting at £1,250
BMW X5 for sale
51 Great deals out of 1,195 listings starting at £2,195
Mercedes-Benz C-Class for sale
588 Great deals out of 5,775 listings starting at £995
Land Rover Range Rover for sale
59 Great deals out of 1,546 listings starting at £3,779
Mercedes-Benz S-Class for sale
14 Great deals out of 452 listings starting at £2,500
Mercedes-Benz CLS-Class for sale
43 Great deals out of 538 listings starting at £2,990
Audi Q7 for sale
62 Great deals out of 748 listings starting at £6,495
BMW X6 for sale
15 Great deals out of 308 listings starting at £11,500
BMW 3 Series for sale
561 Great deals out of 7,236 listings starting at £995
Mercedes-Benz B-Class for sale
86 Great deals out of 906 listings starting at £2,000
Jeep Grand Cherokee for sale
13 Great deals out of 243 listings starting at £2,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.