WIS 82.25 Signalling Equipment/Emergency Alarm System

Issues - Turn Signal Indicators

Applying a turn signal produces an error code such as "check the right turn indicator globe" and fast (double frequency) flashing of the dashboard light. The external turn indicators still flash at the correct frequency.

The issue may only happen occasionally and resets when the ignition is turned off, although the ECU stores a fault.

It can be very frustrating especially when you check all the turn indicator globes and they appear all OK.

There are several possible causes for the error code such as "check the right turn indicator globe".

Issue 1 - Problem with External Mirror Turn Signal Indicators

A common issue with the External Mirror Turn Signal LEDs is a broken wire where the wires flex when the mirror folds.

One or all of the LEDs work intermittently caused by bad connections on the LED printed circuit boards.

The LEDs in an external mirror may be glowing dimly.

The problem can be, but is most likely NOT, the passenger side door control module (DCM) which controls the seat heater, seat controls, window and mirrors.

Solution 1A - Broken Wires in External Mirror Turn Signal LEDs

• Remove the mirror by pressing in a small spring clip at the top.
• Release the mirror housing cover by also pressing in a spring clip near the outer edge.
• Unclip the LED unit from the housing.
• Plug the LED unit into the connector.
• Turn the emergency flashers on (no need for the ignition switch to be on).
• Test by carefully pulling and pushing the thin, identical black wires where they bend when the mirror folds until you find a faulty wire.
• Usually they break inside the insulation, which is not visible.
• It may also be inside the mirror structure where a splice is not possible.
• Remove the insulation at the break.
• Splice in an additional two-inch piece of wire which should allow you to pull the broken ends out of the structure
• Complete the repair by splicing together each broken end.
• Take the time to very carefully seal the seams on the LED unit with clear RTV silicone, which helps prevent water getting into the unit.
• Reinstall

Problem solved - less than an hour and no cost.

• With thanks to wallyp at reference: http://www.benzworld.org/forums/w220-s-class/1707657-s500-w220-mirror-turn-signal-issues.html

Solution 1B - Faulty LEDs or LED Joints in External Mirror Turn Signal LEDss

• Remove the mirror by pressing in a small spring clip at the top.
• Release the mirror housing cover by also pressing in a spring clip near the outer edge.
• Unclip the LED unit from the housing.
• Test the individual LEDs on the bench with a suitable power supply.
• The OEM LED joints are crimped.
• Resolder all the LED joints.
• If any LEDs are faulty they can be replaced individually.
• Factory LEDs are 4.5W.
• Typical replacements are 5W but don’t have enough resistance.
• Solder three 33 Ohm, 1/2 W resistors from Radio Shack, in to the wiring.
• Clean and lubricate all the connectors with rubber grease (helps prevent water ingress).
• Put rubber grease on the seals.
• Reinstall

Issue - L. or R. TURN SIG. RFLECTR - VISIT WORKSHOP

The following video shows how to repair and restore your original outside mirror turn signal light's LED bulbs. The same lights are used in not just 2000-2006 S500 and S430 but also 2001 to 6 CL55 AMG, S55 AMG, S600, 2004-6 CL600, and 2005-6 CL65 and 2006 S65 AMG

Complete Video

Load video YouTube YouTube might collect personal data. Privacy Policy ContinueDismiss W220 Turn Sig Reflector Light Restoration (By Masood)