Installation instructions for the brake caliper adapter 1201 Mercedes Benz SLS on the rear axle of the W447

Here you will find step-by-step instructions on how to install the handbrake from the Mercedes-Benz E-Class W211 (2304200312) on the W447 / W639. This is absolutely necessary to ensure that the handbrake function is still available when converting to a larger brake disc and a larger brake system on the rear axle.

Please note

Please read these instructions carefully before starting work. If the conversion is too difficult for you, please commission a specialist company to carry out the installation. We cannot accept any liability for consequential damage caused by incorrect installation. Correct installation and adjustment will save you time, money and trouble.

What do you need for this?

Depending on your technical knowledge, approx. 2-3 hours
Torque spanner with suitable attachments
Liquid threadlocker

Dismantling:

Old brake system (brake disc, brake caliper and brake calliper carrier)
Remove or machine the air baffle plate or brake backing plate or armature plate (we prefer to remove them, as the ventilation of the brake is better guaranteed).
Remove the wheel hub, handbrake shoes and spreader plates from the wheel bearing housing

!!Important!!:

It is essential to check that there is no rust or paint residue on the screw-on points of the steering knuckle or wheel hub. If this is the case, please clean them. Then check the steering knuckle threads for damage.

First, the old brake caliper and brake disc must be removed.

The best way to do this is to jack up your vehicle or use a jack. Ideally, you should have a lifting platform available :)

The heat protection plate and the wheel hub must then be removed so that you have free access to the handbrake.

The handbrake must then be completely removed from the wheel bearing housing. It must be ensured that all screw connection points of the handbrake have been loosened and that they can be easily dismantled and removed.

To be able to drive the brake system on the W447, the Mercedes-Benz E-Class W211 (2304200312) must be fitted, as these are less bulky and therefore the new 360x28mm brake discs from the Mercedes GL (09.A907.11) can be fitted.

In order to fit the E-Class (W211) brake shoes without any problems, the wheel bearing housing must be machined slightly (see next pictures)

first the cast nipples must be ground flat

Furthermore, everything on the contact surface must be ground slightly flat (see picture).

This must be done so that the new 360x28mm brake disc from the Mercedes Benz GL (09.A907.11), which is slightly smaller in internal diameter than the original brake disc, can be fitted cleanly and does not protrude or grind anywhere.

The handbrake can now be reinstalled on the wheel bearing housing.

All you need to do is fit the brake shoes for the Mercedes-Benz E-Class W211 (2304200312). You can find them here (click here)

The huge advantage here is that the spreader plates for the handbrake from the Mercedes Benz W447 / W639 can still be used and do not have to be converted to those from the Mercedes Benz E-Class.

If you want to continue using the anchor plate / heat protection plate, this must be slightly adapted.

The wheel hub can now be reattached to the wheel bearing housing.

The preparatory work is now complete and the next step is to convert to the large brake system with the Epytec tuning adapters :)

The tuning Epytec adapter can now be fitted.

It is important to ensure that the adapter with the Epytec lettering and engraving is attached to the inside of the vehicle so that the TÜV inspector can easily read the engraving during approval.

!! Tipp !! Use threadlocker.

The Mercedes Benz SLS C197 AMG 4-piston brake caliper (part number: A1974232798 / A11974232898) can now be bolted on.

You can then reconnect the brake lines and bleed the brake completely. For this conversion, it is recommended to convert directly to steel flex brake lines.

Click here to go directly to the appropriate steel flex lines (click here )

These have the following advantages:
No pressure loss when the brakes are applied, noticeably more precise pressure point
No swelling as with rubber lines
Cost savings, as steel braided lines have an almost unlimited service life and do not have to be replaced every 3-5 years
Shorter braking distance
Marten protection
Optics

The handbrake servomotor can now be relearned and everything works as it did before :)

When the tuning adapter is fitted, the 360x26mm brake disc from the Mercedes-Benz GL Class (09.A907.11) and the Mercedes-Benz SLS C197 AMG 4-piston brake caliper (part number: A1974232798 / A11974232898) can be fitted.

!! Important!! The original handbrake cable can still be used with this conversion and does not need to be shortened.

Once the complete brake system, including the brake disc, has been fitted, it must be checked that everything moves freely and that the brake system is not touching or rubbing anywhere.

Now you can refit the rim.

When fitting the rim, make sure that the brake caliper does not rub against the rim.

If this is the case, you can counteract this with track plates if necessary, so that the rim has enough distance to the brake caliper.

The TÜV generally requires a minimum distance of 3 mm.

Click here for our track plates (click here)

The conversion with the Mercedes Benz SLS C197 AMG 4-piston brake caliper (part number: A1974232798 / A11974232898) and the conversion to the handbrake shoes of the Mercedes-Benz E-Class W211 (2304200312) is now complete.