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

SL/R129: Barn Find 500SL Journey

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Old May 15, 2026 | 11:57 PM
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isntgav's Avatar
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From: IL
1989 190E 2.6
Barn Find 500SL Journey

Hey everyone, I just got myself a barn find 1992 500SL with roughly 48k miles that has been sitting for 8 years. I plan to make it my daily once I can get it running. So far I've replaced the sparkplugs, air filters, oil filter, and oil. It starts, briefly. It then dies after a couple seconds of running extremely rough. I've traced it down to a fuel issue, probably fuel filter or pumps if I had to guess. Anyways, that isn't the point of this. I'm new to the SL's, and was wondering what I should look out for on this thing to make it as reliable of a daily as I can. From what I saw during my brief moments of a running engine. ABS and ASR light are on, so I'm looking for tips on how to trace down possible causes if they persist. Thanks guys, and I will update this thread with my progress on getting it running. I assume I will need some help.

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Old May 16, 2026 | 05:05 AM
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From: Helsinki
R129.067 (500SL '93), EQE, MGB
Instead of just guessing, for starters read your diagnostic trouble codes (DTCs). Also, check the distributor caps and wires if not already done.
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Old Jun 11, 2026 | 06:38 PM
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From: Nelson NZ
17 E220d all-terrrain, 92 SL500, 16 C250D Wagon, 16 A200 (wife)
Good luck with your journey Isntgav!
These things were pretty well built and lots of stuff on them just keep on going. Plenty of info on forum for the likely help you need.
Yes distributor caps are an easy remove, wipe all moisture out and air off, after long periods of no use these are likely a problem. After a long time of no use, mine will idle at first start but any hint of throttle to move off causes dying and hard to get going, have to leave a bit. Once its going a good long drive helps a lot. I've replaced mine a while ago, but this reluctance after a time unused persists. This might be not the only thing you have by the looks.
Keep us posted!
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Old Yesterday | 11:58 PM
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vesiadog's Avatar
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1998 SL500,2011 GL550,2009 ML350,past 1995 E320 Cabrio ,2005 ML500,2006 ML500,1996 SL500,1972 280SEL
fuel distributor..systems

Start reading everything you can about the fuel distributors…
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