noise when towing caravan

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nigelbunt

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when towing my van, when hitting 55mph i experience loud noise from beneath car. no vibrations felt and noise goes when i go thro 55 any one any ideas as local garage clue less. car has broken rear spring, could this somehow be the cause of this puzzleing noise
 

rpe2

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Silchester
Your Mercedes
His: 2018 E220 d; Hers: 2016 SMAX
Would be the place to start, for the general safety of the car if nothing else..
 

turbopete

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Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
also check exhaust is well clear of suspension etc under such loading situations. could just be resonation at a certain point in the revs that you only notice when cruising
 

*Thumper

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Warwickshire
Your Mercedes
C220 CDi (09)
I'm with turbopete ......... you can get some unnerving resonation (word?) ......... when under extreme load .......... my Passat used to have some interesting sounds when pulling the van.
 

television

Always remembered RIP
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Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
It could be the center bearing on the prop or engine mounts
 

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