Sucessful reduction of road noise

190

MB Enthusiast
Joined
Mar 4, 2015
Messages
3,792
Location
Cheshire
Car
2009 W204 C180K
I've always noticed at motorway speeds that there was more a little more road noise coming from the rear on the near side compared to the off side.

After 2 years of ownership I decided to investigate by removing the rear seat squab to see if there was anything obvious that could be rectified. What I found was a circular metal access hatch which hadn't been very well fitted allowing an air gap. This picture I found isn't my car or in fact even a W204 but the plate is the same. You can see it isn't exactly flat and that there is a cable entry from the very bottom of the picture which means it needs some care and attention in fitting if it's to make a good air tight seal.

Well they hadn't used enough care and attention so I removed and refitted it ensuring it sealed properly. Result ! The higher level of road noise on the near side has gone and the car has a new feeling of refinement. Only wish I'd done it 2 years ago.



151122d1236111949-removing-rear-seats-e-brake.jpg
 

Sambo

Active Member
Joined
Jul 1, 2013
Messages
447
Car
2 x MB
Sounds like it's had a tank drain maybe due to mis fuelling, there's not really any other reason why you'll need to remove them and they're fitted well from factory.

Good job for sorting it tho!
 

Chrishazle

MB Enthusiast
Joined
Nov 13, 2008
Messages
4,360
Location
Nr Ashford, Kent
Car
2008 S204 C220CDI Elegance Estate Auto, 2008 R171 facelift SLK280 Auto.
Best reduction of road noise I've had with my S204 was changing 16" rims and Contisport Contact 3's to 17" rims and Goodyear Eagle F1 Asymmetric tyres - car is now whisper quiet - which means I can hear every squeek and moan from the "co-driver" in the passenger seat. Seriously considering changing back to Contis!!:mad::mad:
 

BEA76

Active Member
Joined
Aug 26, 2015
Messages
119
Location
Guildford
Car
W205 AMG Line C220d
Common problem with SatNag's
 

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