My 02 SLK320 has developed an annoying front end squeak -- noteable when hitting even small bumps. Since the A-frames, etc, have no grease nipples, I used WD40 to spray in the suspension joints, and this worked well for a day. At least it showedwhere the squeak was.
QUESTION 1: How do I grease the front end if there are no grease nipples? Can it be that MB really expects one to dismantle the suspension to grease or replace it?
QUESTION 2: Has anyone drilled to install nipples themselves?
Thanks.

 

"Modern" cars do not have grease nipples!
Materials used are supposed to be self lubricating / do not require lubricant. Many materials e.g. Nylon do not like to be bathed in oil etc since its adversely effects there properties.
The real problem is water ingress into the mating surfaces which since they are not greased causes the "metal" surface to corrode and then wear away the bearing surface due to rough corroded surface.
Suggect your squeak is coming from the roll (sway) bar bushes since you say it is when you hit a two wheel bump.
Proper course of action is to replace the bushes but need to ensure that the mating surface on the roll bar is OK.

A spray lubricant such as WD40 will usually "cure" the problem for a short period but soon "evaporates".

Stuart

 

It also depends where you sprayed the wd40 to fix..

If just the rubber inner arm joints then some silicone spray will last longer, if on the outer ball joints then they will need replacing.

Bazzle