Your R129 SL emerged at a time of pivotal technological and engineering advances, resulting in the incorporation of advanced equipment that continues to keep the R129 SL in-line with modern consumer driver’s needs. With this more advanced mechanical and technological configuration comes the need for more intelligent diagnostic tools, thinking and processes; something we at SLSHOP have mastered over more than ten years dedicated to R129 models.  

Our R129 SL diagnostic service has been designed to establish, assess and evaluate all known and unknown mechanical or electrical faults you are experiencing with your R129 SL. This is a tailored service that will follow an approach specific to your era and model of R129 SL. 

We will start with a consultation to understand the issues you are experiencing, before our Modern Classic team will follow the diagnosis process for your particular car and the issue you are experiencing. Our team possess industry leading technology to diagnose issues with your R129, but limitations are presented by the number of faults that the ECUs present. 

Examples of how we diagnose an issue:

EARLY R129 (1990-1993) 

Poor running: This era of V8 models retained the same injection system as the late R107s. The KE fuel Injection system can be compromised by corroded lines, issues with the coils or HT leads, causing starting and running issues. Due to the simpler nature of this system, it is easier to locate and identify such an issue by checking these components.  

Soft top issues: Earlier R129 models have basic ECUs that can be read using a ‘flash code reader’. This is a system whereby the number of flashes indicates a potential, leading our team in the right direction. This is a directional support and finding the definitive issue comes down to individual testing of your soft top’s electrical components. 

LATE R129 (1997/98 ONWARDS): 

Poor Running: Six-cylinder models from 1996 onwards feature MAF sensors, which are responsible for ensuring the correct flow of air into your engine. Over time, contamination will occur and your engine may run rich and blow smoke or run lean and hesitate under acceleration. Our team can instantly identify these issues simply by driving and inspecting your car. No technology necessary.  

Soft top issues: With developments in technology during the R129’s life, new ECUs were incorporated to allow more advanced diagnostics. We possess the STAR computer equipment purpose built to diagnose electrical faults on the R129. This allows our team to use live data to quickly identify your soft top system’s faults.  

This is just a snapshot of the varying approach our team takes to the R129 SL. Other diagnostic areas that our tools allow include issues with traction control, ABS and the CAN-BUS electrical system. 

WHY WE WILL SOLVE THE ISSUES FASTER

As the leading SL specialist, we are constantly innovating to speed up the diagnostics process. The quicker we can identify an issue, the quicker we can get you back on the road. Our team have owned and experienced these cars, giving them an intimate understanding of how they should drive and handle. Furthermore, our on-site Parts Store gives us immediate access to replacement components to achieve a prompt return of your vehicle.  

Undoubtedly, the fabrication shop is the beating heart of SLSHOP. Here, our team of experts work to save cars from extinction. An R107’s structure is complex. It needs to be approached in exactly the right way. We’re proud of our fabrication team and the work they do. Ultimately, it’s the foundation that the other departments rely on.

Poke your head inside our fabrication shop.

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ENJOY YOUR VEHICLE WITH CONFIDENCE. PROTECT YOUR INVESTMENT FOR AS LITTLE AS £55.00 PER MONTH