CL500 / S500 on w215 and w220 chassis pls

[Borys]

Got a question to rgds how your v8 engine sound?
On start up does it whines/whistles a bit?
Checked youtube and with my mates s500 and it seems they whine a bit up to 2000rpm
Was thinking about alternator bearing at fault first but like I said compering to other car all seem to sound like this
Whats your views on this guys?

 

[lexman8]

No whining sound on mine.

 

[Borys]

After reading on net I suspect pulsation dumper at fault
Had my pump and valve block replaced, only accumulator left