SL-Class (R129) 1990-2002: SL 280, SL 300, SL 320, SL 500, SL 600, SL 60 AMG

SL/R129: Relays

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Old Apr 10, 2025 | 03:33 PM
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Mitch Spartan's Avatar
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From: Uk
Mercedes r129 500 SL and 2019 volvo V90
Relays

Hi all.So last year I had the car MOT'd and ready to go to Supercar Festival. On the morning of the show I started it and the left indicator came on continuously, followed by the right one.If I use the indicator switch they come on as normal and the other one will turn off. Once you turn it off, they both start flashing again. Thought I'd check relays and got one of those relay testers but I didn't realise they were circular pins (not mechanically minded lol)I also want to locate the OVP relay because I'm hoping there is an issue there and that is what's causing the ASR/ABS lights to come on and car to get very clunky for a few mins. Should I just fork out and change all the relays?Can I test relays at home?Are there any of the flat pin relays in the car?Also am I missing some? Please see pics
[img alt="3slots missing any relays or plugs for relays.
Do you know part numbers for those and what do they do?"]https://cimg0.ibsrv.net/gimg/www.mbworld.org-vbulletin/1500x2000/pxl_20250402_165817496_eb039242263b4ea8b59c49269b6 3fa27ed6739ed.jpg[/img]
3 slots missing any relays or plugs for relays. Do you know part numbers for those that I have and what do they do?

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