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Power Seat Relay > < Diagram Information and Instructions|Page 10510
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Power Seat Motor Position Sensor: Technical Service Bulletins
Cellular Phone - Interference During Seat Movement

TO:

OUR MERCEDES-BENZ PASSENGER CAR DEALERS

DATE:

June 1990
REF.NO. 82/54

SUBJECT:

POWER SEAT ADJUSTMENT PROXIMITY SWITCHES MODEL 129 WITH AFTERMARKET CELLULAR PHONE
INSTALLATION

When operating the power seat switch while telephoning, or with the telephone system on, the power seat adjustment may malfunction. High-frequency
signals generated by the telephone system may be interfering with the normal function of the seat proximity switches.

The proximity switches are located behind the left and right B-pillar panels.

To prevent this fram occurring, modified proximity switches should be installed when installing a cellular telephone. These switches are installed in
vehicles within the Effective Serial Number Range below and may be installed in vehicles prior to production phase-in.

Effective Serial Number Range

Model

Chassis End Number

From

To

129

006425

006553

007204

All

Parts Information

Part Name

Part Number

Left proximity switch

129 821 01 51

Right proximity switch

129 821 02 51

In Case of Warranty:

Time Allowance

91-2172

Proximity switch - Both seats, Repl.

0.4 hr. | 90

Included Text:

Baggage shelf, R & R Trim Paneling-Rear compartment, R & R Check for proper function

Does Not Include:
Hardtop, R & R

Damge Code

91489 73

Proximity switch, electrical fault

Power Seat Relay > < Diagram Information and Instructions|Page 10510