300E W124 fan?
 

Help me please..!

I have a 1988 300E W124.
It has a squeaky fan that I know a little TLC or WD40 would sort..
The trouble is.., how do I get to it!??

Under the bonnet I have three plastic cases. The middle one lifts off and has two holes underneath, but nothing else.
The more interesting side ones seem to be plastic rivetted down or something.
Any ideas. :confused:

I have an MB CD, but it doesn't show what to do. :(