Radio - Modified Anti-Theft Protection: Overview

87mercedes03

TO: OUR MERCEDES-BENZ PASSENGER CAR DEALERS

DATE: April 1987 REF. NO. MBNA 82/24


SUBJECT: ANTI-THEFT ALARM PROTECTION FOR RADIO

A. MODIFIED ANTI-THEFT ALARM CONNECTION AT RADIO
B. MODIFIED ANTI-THEFT ALARM CONTROL UNIT AS OF MODEL YEAR 1986

This Service Information updates information published in the Model Year 1987 Introduction Manual, Models 107, 124, 126 and 201.

Beginning with model year 1986, vehicles equipped with the anti-theft alarm provide anti-theft protection for the Becker Grand Prix radio as well. If the radio is removed while the anti-theft alarm is armed the radio will be rendered inoperative and can only be repaired by the radio manufacturer.

Several different versions of the connection of alarm harness to radio chassis have been used. A description of the various versions of alarm harness to radio chassis connections is listed below.

Model 107 vehicles produced prior to August 1986 and existing stock supplies of unmodified radios must be modified to version 3. In all other models, the modification should only be performed when replacing a defective radio chassis. The procedure for this modification is in section "A" of this Service Information. After performing the modification, a remark stating "Positive-lock connection installed on radio anti-theft alarm harness:
(date)" should be entered in the inside cover of the vehicle's maintenance booklet.

FIGURE 1:

1. Version 1 utilizes a console mounted spring contact (Figure 1). This version is no longer used.

FIGURE 2A:

FIGURE 2B:

2. Version 2 utilizes a positivelock spade connection on the lower left of rear cover (Figure 2a) or left rear lip of bottom cover (Figure 2b). This version was phased into production in models 107, 124.193 and 201 in August 1986.

FIGURE 3A:

3. Version 3 utilizes positivelock spade connection located on the center rear lip of the bottom cover.

FIGURE - 3B MODIFIED EXCHANGE RADIO:

Figure 3b illustrates a modified exchange radio. Only the center positive-lock spade connector should be used for connection to anti-theft alarm system.

FIGURE 4:

4. Version 4 utilizes a positivelock spade connection riveted on the lower center of the rear cover (Figure 4). This version has been phased into production as of January 1987 and is the current version.