Notes on towing as well as test and adjustment work - RA3000TPM0010X(30-0010)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Towing

On ASR vehicles no restrictions are necessary when towing on both axles.

Towing with a raised axle is only permissible when the ignition is switched off (in position "1") otherwise the rear wheels are braked.

Test and repair work

For performance and emission testing on the brake dynamometer, the following is to be noted on vehicles with ABS/ASR:

The ASR system must be rendered inoperative so that the rear wheels are not braked when driving onto the brake dynamometer.

On vehicles with an ASR system which can be diagnosed (as of ASR III), connect socket 1 and 6 to the test coupling (X11/4). As a result the ABS/ASR control module is in diagnosis mode and the ABS/ASR malfunction indicator lamp comes on.
On vehicles with an ASR system which cannot be diagnosed (ASR I and II), disconnect the coupling at the EA or ASR control module.

Fig 1: Identifying Connect Socket And Test Coupling
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

If it is necessary to increase speed at the engine during test and adjustment work on vehicles with ABS/ASR, the engine speed increase must increase directly from the accelerator pedal. If the speed is increased at the throttle linkage in the engine compartment, limp-home mode is actuated and a fault is stored in the fault memory.

With the ignition ON, the engine switched off and the vehicle stationary, programming of the special mechanical throttle valve angle (idle speed position) of the engine is carried out by the computer in the control module. The correct values are calculated and saved again. The calculation takes 90 seconds.

The plug connection of the actuator is water-tight. It may only be opened during the test work specified in the test program. Cleaning agent or contact spray may not be used on the actuator plug connection.

EA or CC/ISC control module is not protected by fuses.

Welding work

The following points are to be observed when welding with an electrical welder:

Disconnect negative terminal of the battery.
Connect the ground terminal of the welder directly to the part to be welded.