Question about 1998 Mercedes-Benz S-Class

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Power window relay or control unit

Hi,have a problem with a 97/98 s320 power windows.none of them work ,fuses in auxilllary fusebox in boot ok.have swopped switches with another car didnt help.no power at switches with ignition on so lets me think relay or control unit faulty.but cant find one.can anyone let me know where ican find the relay or control unit. cheers chris

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  • rolan1961 Mar 08, 2009

    Mercedes Benz E320 1996 Power Windows and Sun Roof no function

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Control unit (with MANY wires) is inside trunk on right side and there is a fuse box with 3 fuses at the "REAR"...assume trunk again...I have schematic only...remove the Control unit wire connectors and re-insert them to polish the contacts...

Posted on Jul 04, 2008

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A2Resource
a great vw resource site
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Relays:
Num.Relay Arrangement and Pinout (with control number stamped on relay)
1A/C Relay (13 or 140)
1A/C Switch
2Radiator Cooling Fan
3Fan Switch High Speed
4Battery, Fuse 23
5A/C Clutch (via pressure and temperature switches)
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7Main Fusebox Ground
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2Rear Wiper Relay (72)
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2Main Fusebox Run Power, Fuse 4
3Rear Wiper Motor
4Wipe/Wash Signal from Switch
3Digifant Control Unit (30 or 32), Motronic OBD1 Control Unit (109)
1Main Fusebox Ground
2Tachometer
3Main Fusebox Start/Run Power
4Main Fusebox Battery Power
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6To ECU and Engine Electronics
4Load Reduction Relay (18)
1From Ignition Switch Run Power
2To Main Fuse Box Run Power
3Main Fusebox Battery Power
4Main Fusebox Ground
5Low Coolant Level Control Unit (43)
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2Low Coolant Level Sensor
3Coolant Temperature Sensor, Gauge
4Main Fusebox Ground
6Flashers (21)
1Main Fusebox Ground
2Flasher Output
3Flasher Input/Power
4X/6 (Trailer Light)
7Headlight Washer (33)
1Main Fusebox Ground (B/4 to C/3 to Ground)
2Headlight Washer Pump
3Headlight Switch Pin 56 (headlights) (B3 to D4 to light power)
4Main Fusebox Battery Power (B/5 to Y/2)
5Windshield Washer Pump (B/1 to B/2 to washer pump power)
8Wash/Wipe/Intermittent Relay (19 for standard relay, 99 for variable intermittent module)
1Main Fusebox Ground
2Intermittent Switch
3Main Fusebox Run Power, Fuse 5
4Park/Low Signal (ground when parked, positive when on low speed)
5Wiper Motor Low Speed Output
6Wash Switch (positive for front wash)
9Seat Belt Warning Control Unit (4 or 29)
1Main Fusebox Ground
2Seat Belt Switch
3Door Switch
4Seatbelt Light
5"Key In" Power from Ignition Switch
6Main Fusebox Start/Run Power
7Automatic Shoulder Belt Controller
9Radio/Lights Buzzer (36)
1Main Fusebox Ground (not used)
2A1/4 (Left Parking Lights)
3Vehicle Speed Sensor
4Seatbelt Light (not used)
5"Key In" Power from Ignition Switch
6Main Fusebox Start/Run Power (not used)
7A2/2 (Right Parking Lights)
10Fog Light Relay (110 for fog lights with low beam headlights only, 53 for parking light/high beam fog lights)
1Parking Light Power
2Headlight Switch Headlight Power (Low/High)
3Fog Light Switch Power, Fuse 10
4Main Fusebox Battery Power
5Main Fusebox Ground
6Low Beam Headlight Power
11Horn (53)
1Main Fusebox Start/Run Power
2To Horns
3Main Fusebox Ground
4From Horn Button
12Fuel Pump Relay (80, 67 or 167)
1Main Fusebox Starter Power (not used)
2Main Fusebox Start/Run Power
3To ECU (Fuel Pump )
4To Fuse 18, Fuel Pump, Oxygen Sensor Heater
5G2/6 (not used)
6Main Fusebox Battery Power From 30B
7G2/7, T1 (not used)
8Main Fusebox Ground (not used)
9M/4, U1/8, G2/5 (not used)
12Glow Plug Relay (102 or 104)
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2Main Fusebox Start/Run Power
3Engine Temp Sender (preheat)
4Glow Plugs (Z1)To Fuse 18 (not used)
5G2/6 (not used)
6Main Fusebox Battery Power From 30B
7G2/7, T1 (not used)
8Main Fusebox Ground
9Water Separator, Glow Plug Light

remember to check out the website below for more help
http://www.xjamiex.com/mk2resource/electrical/CE2.html

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