Bonding instructions

Required special tool: 

• 2 357 309

1 Brief overview of surface preparation 

1.1 Structure 

Material (surface condition) Type of repair	Preparation
Aluminum (used part)  Repairs on front end/rear end Example: Replacement of engine mount or front wheel arch	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Grind bonding surfaces to a metallic bright-finish Clean with cleaning agent R1 Flame-coating Bond with adhesive K1
Aluminum (new part)  Repairs on front end/rear end Example: Replacement of engine mount or front wheel arch	Do not  sand bonding surface Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Bond with adhesive K1
Carbon Fiber Reinforced Plastic (new part)  Bonding new parts to the body with adhesiveK1 Example: Replacement of rear wheel arch	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Sand with non-woven abrasive S1 Clean with cleaning agent R1 Activate with Betawipe 4800 Bond with adhesive K1
Carbon Fiber Reinforced Plastic (used part)  Bonding new parts to the body with adhesiveK1 Example: Replacement of B-pillar	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Sand adhesive residue Clean with cleaning agent R1 Bond with adhesive K1
Sheet steel (used part and new part)  Partial replacement of components Example: Replacement of B-pillar or rear wheel arch	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Grind bonding surfaces to a metallic bright-finish Clean with cleaning agent R1 Bond with adhesive K1

1.2 Outer skin (without roof outer skin) 

Material (surface condition) Type of repair	Preparation
Sheet steel (used part)  Adhesion for outer skin component Example: Replacement of rear quarter panel or tail panel	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Grind bonding surfaces to a metallic bright-finish Clean with cleaning agent R1 Bond with adhesive K5
Sheet steel (new part)  Adhesion for outer skin component Example: Replacement of rear quarter panel or tail panel	Do not  sand bonding surface Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Bond with adhesive K5

1.3 Roof outer skin 

Material (surface condition) Type of repair	Preparation
Aluminum (new part)  Adhesion for roof outer skin	Do not  sand bonding surface Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Bond with adhesive K2
Sheet steel (primer undamaged)  Adhesion for roof outer skin	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Cut back adhesive bead Clean with cleaning agent R1 Bond with adhesive K2
Sheet steel (primer damaged)  Adhesion for roof outer skin	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 thin coat with adhesive K1 Bond with adhesive K2
Carbon Fiber Reinforced Plastic (used part)  Adhesion for roof outer skin	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Cut back adhesive bead Clean with cleaning agent R1 Bond with adhesive K2
Carbon Fiber Reinforced Plastic (new part)  Adhesion for roof outer skin	Remove coarse dirt from the bonding surfaces using solvent cleaner R2 Clean with cleaning agent R1 Sand with non-woven abrasive S1 Clean with cleaning agent R1 Activate with Betawipe 4800 Bond with adhesive K2

2.1 The following general conditions are applicable to all bondings: 

• The working temperature of glue cartridge must be more than 18°C.
• Object temperature, vehicle and new parts, at least 15°C.
• Read the individual repair instructions to determine the thickness and positioning of the adhesive bead.
• After applying the adhesive, check whether an adhesive component has emerged at the back of the glue cartridge. If yes, break off the bonding procedure. Clean new part. Use new glue cartridge.
• Join components and secure in position.
• Remove excess adhesive. Do not use solvent cleaning agents.

2.2 Surface preparation (structural): 

2.2.1 Flame-coating (aluminum): 

• Clean bonding surfaces with cleaning agent R1.
• Remove oxide layers or paint from bonding surfaces using a stainless steel wire brush or sandpaper with 120 graining.
• Clean bonding surfaces with cleaning agent R1.

  Allow cleaned surfaces to dry for approx. 5 min.

  Bonding surfaces must be completely dry.

• Flame spray the surface:

  Go over the bonding surfaces slowly with the flame.

  Avoid flaming with the blue part of the flame.

  Condensation water appears on the area that is still uncoated. The condensation water in the line of the flame must evaporate completely.

  Directly after flaming, coat the still hot bonding surfaces (approx. 50 °C) with primer. P1

  Prime with a brush, cotton or similar item.

  Allow the coated surfaces to dry for approx. 5 minutes.

2.2.2 Surface preparation (Carbon Fiber Reinforced Plastic new part): 

This surface preparation is applicable to new Carbon Fiber Reinforced Plastic parts.

Remove coarse dirt from the bonding surfaces using solvent cleaner R2.

Clean bonding surfaces with cleaning agent R1.

Sand bonding surfaces with non-woven abrasive S1.

Clean bonding surfaces with cleaning agent R1.

Let cleaned bonding surfaces dry for at least 2 min.

Bonding surfaces must be completely dry.

Activate bonding surfaces with Betawipe 4800.

Let activated bonding surfaces dry for at least 2 min.

Bonding surfaces must be completely dry.

2.2.3 Surface preparation (Carbon Fiber Reinforced Plastic used part): 

This surface preparation applies to the B-pillar area at the top.

Remove coarse dirt from the bonding surfaces using solvent cleaner R2.

Clean bonding surfaces with cleaning agent R1.

Grind off adhesive residue to a thickness of approx. 0.5 mm.

Clean bonding surfaces with cleaning agent R1.

Let cleaned bonding surfaces dry for at least 2 min.

Bonding surfaces must be completely dry.

2.3 Surface preparation (outer skin (without roof outer skin)): 

The procedure is described here.

2.4 Surface preparation (roof outer skin): 

2.4.1 Surface preparation of roof frame and convertible top bow from sheet steel: 

Cut back adhesive remnants (1) with scraper 2 357 309 to a minimum of 0.5 mm.

Primed surface must not be damaged.

Smaller damage to 5 mm or scratch marks can be ignored.

In the event of larger damage to primer (greater than 5 mm), proceed as follows:

Clean damaged area with cleaning agent R1.

Apply adhesive K5 to the bare areas with a spatula or a brush. Apply a uniformly thin layer (max. 0.5 mm). The roof outer skin can be bonded after a curing period of 24 hours.

The adhesive flange area must not be painted over when the roof frame is being repaired or replaced.

2.4.2 Surface preparation of Carbon Fiber Reinforced Plastic (used part): 

Remove coarse dirt from the bonding surfaces using solvent cleaner R2.

Clean bonding surfaces with cleaning agent R1.

Cut back adhesive bead with scraper 2 357 309 to a minimum of 0.5 mm.

Clean bonding surfaces with cleaning agent R1.

Let cleaned bonding surfaces dry for at least 2 min.

Bonding surfaces must be completely dry.

2.4.3 Surface preparation of Carbon Fiber Reinforced Plastic (new part): 

Prepare the surface as described under point 2.2.2.