Part Numbers for W124

(Note: Part numbers often are superseded. Check with your dealer or parts man for the latest.)

 - Headlight Assemblies (Bosch)

R 124 820 26 61 Euro headlamp (with vacuum adjustment) and yellow turn signal
L 124 820 27 61 Euro headlamp (with vacuum adjustment) and yellow turn signal

R 0 301 073 302 Bosch number
L 0 301 073 301 Bosch number

 - Valance Panels, below headlamp (plain, must be painted)

R 124 889 14 63 Valance Panel, w/ 1986-93 USA wipers
L 124 889 13 63 Valance Panel, w/ 1986-93 USA wipers

R 124-889-18-63 Valance Panel, w/ Euro wipers or 1994-95 USA wipers
L 124-889-17-63 Valance Panel, w/ Euro wipers or 1994-95 USA wipers

R 124-889-16-63 Valance Panel, blank, no wipers
L 124-889-15-63 Valance Panel, blank, no wipers

 - Clear Blinkers

R 124 826 08 43 Clear lens front turn signal lamp
L 124 826 07 43 Clear lens front turn signal lamp

R 1 305 233 937 Bosch number
L 1 305 233 936 Bosch number

  - Clear Blinkers (with amber reflective strip - from '94-'95 W124 models)

R 124 826 12 43 Clear lens front turn signal lamp
L 124 826 11 43 Clear lens front turn signal lamp

R 1 315 106 903 -390 Bosch number
L 1 315 106 902 -390 Bosch number

 - Head Light Connector Components

qty (2) - 006 545 80 28 - six-pin electrical connector, socket
qty (2) - 009 545 30 28 - six-pin electrical connector, cover
qty (4) - 003 545 26 26 - pin, connector

 - Wipers

DOT (non-Euro) - Bosch 3.398.113.095 : 118 mm length : Gray

 - Level Control

Go to Level Control page

- Additional Information (including some Hella part numbers)

Ian Read writes (25 Nov 02):

Here are some Hella numbers that I collected via the web. Most need to be checked out. There appears to be three types of panels behind the lens.

Hella Light Assembly - Grey Panel behind lens, H3 fog, w/ flasher
Left Euro: 1EJ 004 400-111 MB P/N 124 820 01 61 (124 820 21 61, 124 820 35 59)
Right Euro 1EJ 004 440-121 MB P/N 124 820 02 61 (124 820 22 61, 124 820 36 59)
Numbers in brackets are possible alternates, MB has a tendency to change numbers.

Hella Light Assembly - Silver Panel behind lens, H3 fog, w/ flasher
Left Euro: 1EJ 004 400-251 MB P/N 124 820 59 61 (124 820 85 61)
Right Euro 1EJ 004 440-261 MB P/N 124 820 60 61 (124 820 86 61)

Hella showed one other assembly, only the left side, and it states that it contains an H3 driving lamp rather than a fog lamp for the grey/silver assembly above, it also omits a flasher lamp. I'm not sure what a flasher lamp is: aluminum vapour coated shield behind lens
Left Euro: 1EJ 004 440-371 MB P/N 124 820 19 59
assumed P/N for right Euro: 1EJ 004 440-381 MB P/N 124 820 20 59

Optional vacuum adjust items, not correct on the MBClub web page.
[see Euro Light Level Control page for more information]
Rosette/Dial 124 800 06 73
Switch Panel 124 680 21 65 (with telescope steering column)
Switch Panel 124 680 16 65 (without telescope steering column)

To keep the wipers:
I read that one can use the original panels and motors, if they swapped the motors from left to right, drill new holes in the panels and rewire the motor harness. The right master motor has four wires to it while the slave on the left has three wires to it. Swapping motors is necessary because the motors sweep and the parked position of the wipers is opposite on the Euro. Each motor needs a small bracket made and cut out of sheet metal to position them in a different way due to the length of the motor shaft and the shifted cutout in the light assembly. The longer wipers from a S Class or C Class are supposed to work with the old motors.

To lose the wipers:
The hole-less [valance] panels under the 94/95 E lights are supposed to fit under the new Euro lamps, they are also available for about US$10 each. -Ian

-

Rolf writes (25 Nov 02):

One cannot drive at night with the US spec lights found on W124's up to 94. The Bosch lights are the way to go. The US type wipers will NOT work with the Euro lights. The Euro's park on the left and are somewhat longer. Also the holes in the valance panels are in the wrong place. One can leave the wipers off and put a plug in the hole, but I think that they look nice. I installed a set of Euro Lights with new wipers and new panels about two years ago using the standard H-4 bulbs. A new experience in night driving! The installation is not difficult. The wiper motors are installed on the bottom of the light assembly. I got everything except the vacuum adjust parts from Randy Steele at European Parts Specialists www.epsparts.com. Randy is unbeatable in the price/performance of his services. He makes up a kit that contains all parts needed including the new connectors that require four pins in place of the three in the US setup. I had the valance panels painted in my car's color at a local shop ($40) or one can leave the wipers off (Like MB did on the 260E's). I did not install the vacuum adjust, but may do that this year. It involves a new bezel for the headlight switch that has the control on it, a vacuum line to the headlights with a T connector and a vacuum line to the source that in my case is conveniently available just behind the brake booster on the left of the firewall. There are some detail instructions on the big list archives. -Rolf

- Related Service Manual Jobs

Removing and installing the headlamp units, Job 82-4730.pdf

Removing and installing bulbs of headlamp unit - Job 82-1201.pdf

Removing and installing lens of headlamp unit - Job 82-1820.pdf

Removing and installing headlamp reflector - Job 82-2850.pdf

Removing and installing fog lamp reflector - Job 82-2930.pdf

- Wiring Instructions

Click here: wiring.pdf

I was looking at the parts list that came with my Eurolight kit and it said (12) pins, but thinking about it, you only need (2) pins for the city light wires; you reuse all the other pins from the current connectors - they just pop out of the old connector and pop in to the new. I would suggest getting (2) additional (total of 4), though as it is easier to use a new pin at the parking lot end (for the jumper cable) rather than trying to get all of the solder out of the existing pin when you add the jumper. With a real hot solder gun, reuse wouldn't be a problem, but my gun is rather pathetic, so a new pin made it easier.

- Wiring Relays

Click here: WiringUpgrade.pdf

PDQ has provided instructions on how to install relays to power the headlights. This is especially useful when using increased wattage bulbs in your Eurolights.

- Level Control

Click here

A level control system can be added (for those units so equipped) that allows you to adjust the light beam up or down from inside the car while you are driving. This feature can be used when you change the load in the car or if you just what your lights to 'reach' down the road farther (as when you are out on the open road, for instance).

- City Lights

Eurolight lamp units sometimes include a City light.(I believe these are called "side lights" in Europe, but they actually face the front.) A city light is a 4- or 5-watt light that sticks through the main lamp's reflector into the lamp itself. European vehicles are equipped with city lights rather than US-style amber parking lamps. City lights are legal for use as parking lamps in the US and in Canada; amber parking lamps are NOT mandatory.

Since the DOT lights that you are replacing don't have city lights, a very small bit of wiring is required to hook them up when using the Eurolights. The city light has two wires, one of which is a ground wire, and the other of its wires is the positive feed from your front park lamps; the one used for the existing dim amber park lamp filaments. This makes for parking lamps that WORK, and if a headlamp ever malfunctions, oncoming traffic still sees you as a double-track vehicle. In addition, it makes your front turn signals much clearer because they now go "BRIGHT-off-BRIGHT-off" instead of "bright-dim-bright-dim" when the lights are on.

This City Light.jpg shows the city light socket pulled out of its hole. It has a ground wire (brown) attached, as well as a power wire (gray), which would be connected to the Pin # 3 of the Euro assembly. This wiring is internal to the Eurolight assembly. See the wiring.pdf to see how to hookup the Euro lights (including the city lights) to the car wiring.

This picture shows the city light socket. It uses a 4 or 5 watt bulb with a BA9S bayonet base, such as Jahn 4088 5W, 64111 5W, Osram T4W or H6W.

Misc Info

- What is a Rear Fog Light?

It's an added lamp in the driver's side tail assembly (left side in NA; right side where they drive on the wrong side; some countries use both, I am told). It's the brightness of a brake light. You turn it on when visibility is very poor and it allows someone following you to see your car better.

If you opened up your tail assembly, you'd probably see where the extra lamp could go...there's an extra socket position. They were not enabled in USA until about 91 or so. I don't believe that the wiring cables supported the simple addition of the socket, either, but I could be wrong. Would be nice if it did. Neither my 79 or 90 had it enabled; my 92 does.

If you have the rear fog light option (which is an added 20w? lamp in the drivers side rear turn signal), there is a lamp in the center of the main light switch...it illuminates the orange "button" of the rotary switch when it's pulled out to its second detent... IOW, you pull the switch out one detent and the front fogs come on, but no orange button...pull it out to the second detent and in addition to front fogs, the rear fog lamp illuminates, as well as the orange button.

The problem is that some people turn it on when it's not needed for safety and it can be very annoying to those following them.

- Is there a Difference in Quality between Light Manufacturers?

Some have asked if there is a difference in quality between, say the Bosch headlights and some of the more economical brands, like DEPO. More Info.

- W123 Euro lens replacement

On the W123, Hella & Bosch used different non-interchangeable clips.  To replace the glass lens, an ordinary slot screwdriver may be the most effective; just don't use the glass as a fulcrum.  A long thin bladed screwdriver slide under the clips and levered up against the frame seems to work. This seems to be the same method as on the W124 lens.

 - Some Additional Links

mercedesshop.com thread "Questions about Euro driving lights..."

mercedesshop.com thread "124 Euro Headlight Conversion..."