General Information On Body Panels With Weld Stud As Ground Connection - Ah60.00-P-0045-01A

Model all (CAR) 

Body panels with one or more weld studs as ground connection must, depending on the material concept, be connected so that they are electrically conductive with the body via a MIG or MAG weld seam, a MIG solder seam or via resistance spot welding.

Otherwise, a reliable electrical connection cannot be guaranteed.

Theft-relevant component.

Shown on model 223, upper front longitudinal member (1) on right side of vehicle 

Courtesy of MERCEDES-BENZ USA

No reliable electrically conductive connection is guaranteed for mixed constructions of steel/aluminum.

A ground strap must also be installed here.

If no suitable adjacent weld stud is available, an additional weld stud must be fitted (through welding or soldering).

Attachment solely by means of rivets and adhesives is not permissible.

Observe the following information in regard to this:

• The welding point for the additional weld stud must be cleaned of corrosion residues and paint residues and ground down to bare metal.
• The weld stud must be welded with sufficient pressure and current.
• The resulting pitting must be removed and the weld must be cleaned.
• The weld stud must be treated with rust protection primer and treated with primer filler approved by the manufacturer.

If a cavity is present under the weld stud, it must be treated with cavity preservation accordingly.