C220 cdi 2002 w203 knocking noice at rear end

[waterfedpole]

Have a C220 CDI avantgarde year 2002 w203 there is a knocking noise coming from the back end may be rear suspension area when going over a speed bump or pot hole and in some corners exhaust mounting are fine so its not that any ideas gentlemen to sort out the problem?

All The Best

 

[Cole@MBS]

Common as muck, check the bottom coil of the rear springs, they snap!!!!

Welcome to the forums

 

[waterfedpole]

Thank you for the reply what is the best way to check it out it seems the o/s one has been replaced is it expensive?

All The Best

 

[Cole@MBS]

Cheap for the springs, has the lower arm been changed on the o/s, you have to fit the modified lower arm as well as the spring!

 

[turbopete]

what is different about the lower arm? this wasnt changed when a new spring was fitted to dads w203 c220cdi elegance

 

[YZFMERC]

I haved just replaced both rear springs and now appear to have a knocking. Very interested in any info on what arms I need to replace on rear suspension. By the way rear springs are easy to replace on W203. No special tools needed, just a trolley jack to lower and raise arms. Took me no more than three hours to do. Exhaust gets in way a bit (near side) but does not make job impossible.

 

[television]

Check the bushes 20 in the link and the link rods 70

http://www.detali.ru/cat/oem_mb2.as...624716.633&CT=F&cat=69J&SID=32&SGR=180&SGN=05

 

[YZFMERC]

Thanks. Probably worth replacing 20 and 70 then.

 

[television]

Thanks. Probably worth replacing 20 and 70 then.

Use an iron bar to lever the roll bar to see if there is any free play in the links,, the bar can make a knocking when the bush has worn through,, all of this fits with changing the springs

 

[YZFMERC]

Okay. Thanks. Will reply once I have resolved knocking. Cheers.

Roy

 

[5pares]

The bottom arms allow the springs to move causing them to hit against the arms,youl see clear marks on the springs if they have been hitting.

 

[YZFMERC]

Okay. Thanks for info.

Rgds

Roy

 

[Cole@MBS]

what is different about the lower arm? this wasnt changed when a new spring was fitted to dads w203 c220cdi elegance

Sorry Pete, just seen your question, the lower arm has to be replaced due to the new one has a wider dish, thats the mb answer, cant see a lot in it myself, but that your answer!!!

 

[Nuclear Bob]

Television is right - had exactly the same fault in my 2002 coupe - replaced links and bushes and all now OK - not expensive - £150 all including work from local indie.