Notes On Paintwork Repairs - AH98.00-P-9408-02MCC
MODEL 451.3/4, 453, 454.0
Notes on repair painting
The use of materials approved by Mercedes-Benz is absolutely necessary for proper repair because the material characteristics of the recommended products influence the work results and labor times. Only the cleaning agents approved by Mercedes-Benz are to be used for reconditioning powder-coated parts (see care instructions). Plastic parts with recorded working time are always removed for painting.
General preparatory work for painting:
General preparatory work for painting includes masking, preparing the paint, cleaning or degreasing and sanding the part; furthermore preparing the filler and setting up and cleaning the machines; in addition, transport of the vehicle to the workplace as well as wearing protective clothing.
Additional preparatory work for painting:
Additional preparatory work for painting includes e.g. matching the color. The time values specified by Mercedes-Benz relate to the actual painting work with the general preparatory work for painting. The assembly operations and bodywork required are not included.
: Vehicles with diesel engines should on no account be started up when in the spraying or drying booth.
There is a risk of explosion due to preglowing.
The following steps should be observed before and during repair work:
Disconnect the battery at the negative pole (secure the radio code beforehand). Open the convertible soft top. Mask off the taillamps, the rear side windows and the headlamps with heat-reflecting material. Only open the tank cap slightly once in the drying booth and close again immediately after drying. Remove spray cans or similar other objects representing a fire risk from the vehicle. The drying temperature (or object temperature) of 60 °C must not be exceeded.
The paint stages for painting body panels are divided into 3 stages: Stage 1 is subdivided into:
1-E New part paintwork of welded-in body panels with complete paintwork structure (e.g. following sectional repair).
1-M New part paintwork of removed body panels with complete paintwork structure (e.g. doors, flaps)
-J Body inner surfaces.
Stage 2:
Surface paintwork (e.g. with minor paint damage without spackle application).
Stage 3:
Post-repair refinishing with a spackle application of up to 50% (e.g. following dent removal).
Very minor damage on TRIDION:
Immediately cover minor paint damage such as scratches, gashes or stone chipping by means of a gravity cup gun or other means of repair (e.g. spray can, touch-up paint pen) to avoid corrosion formation. When corrosion starts, the corrosion points should be rectified immediately and thoroughly. Finally corrosion protection primer is first applied to the point before the top coat is applied. The outside of the vehicle must be clean and dry for painting work. Ambient temperature should be at least +15 °C. The primary coat must not be damaged!
Rectifying cracks in seam seal:
Lift up the windshield surround and fix in position. Remove powder paint in the seam area without damaging the joining radius. Remove the old seam, for example, with a suitable compressed air milling machine. Then remove the grinding dust and smooth the edge areas. Then mask off the edges of the join so that the bonding edge is under the joining radius. Apply repair sealing and then smooth immediately. Then remove adhesive tape immediately. Observe the manufacturer's drying specifications. Protect the rest of TRIDION from paint mist.
Notes on applying paintwork to plastic
The use of materials and tools approved by Mercedes-Benz is absolutely necessary for proper repair because the material characteristics of the recommended products influence the work results and labor times.
In the event of more severe damage with substrate damage, replacing the plastic paneling with a painted new part or a raw part that is to be painted is to be preferred to a repair.
In the plant, the dyed plastic paneling is provided with a UV protective paint. If the protective paint is damaged by scratches, stone chipping or gashes, the damaged areas should be repaired immediately, otherwise discolorations may occur on the exposed substrate.
Depending on the climate and application location, differences in color shade can occur between genuine parts and replaced parts during the entire vehicle operating time. Mercedes-Benz therefore recommends that the customers' attention be drawn to these color changes.
The following description relates to the paint repair of plastic paneling coated with UV protective paint.
Safety measures:
The drying temperature (or object temperature) of 60 °C must not be exceeded. Plastic parts to be painted should be removed from the vehicle for painting. To ensure that the shape of the plastic parts is retained during force drying, suitable painting stands must be used. For drying temperatures in excess of 60 °C, irreversible changes in shape may occur
General preparatory work for painting:
General preparatory work for painting includes preparing the paint, cleaning or degreasing and sanding the part; furthermore setting up and cleaning the machines; in addition, transport of the plastic part to the workplace as well as wearing protective clothing.
Additional preparatory work for painting:
Additional preparatory work for painting includes e.g. matching the color.
The paintwork of plastic parts is applied in one paint stage:
Stage 2 (applying the top coat and special-effect painting):
Surface paintwork (with minor paint damage without spackle application or primed or filled new and repair parts).
Repair of plastic parts
Materials approved by Mercedes-Benz may be used for the repair of plastic parts. The manufacturer's data on the use and processing must be observed.
Preparation of substrate:
The intact paint surface as well as all substrates to be processed must be clean and free from dust and grease. All substrates must be properly ground and washed off with deionized water.