engine top rattle e230 est 1997

[mark mercedes]

found a loud ratttle in a unit at the top front of the engine, looks part of the cooling system connected to the radiator top hose. what is this unit? is this likely to be a costly repair? assume water pump behind centre pulley...

any help appreciated, trying to save my te from the scrap heap!

yours

mark

 

[Number_Cruncher]

No 29 in this link?

http://www.detali.ru/cat/oem_mb2.as...GM=717.417&CT=M&cat=19K&SID=20&SGR=045&SGN=03

 

[Smudge]

Sounds like the bush in the end of the belt tensioner gas strut to me. Does it get quieter as revs increase?