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Old 12-11-2017, 03:31 PM
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Squiggle Dog Squiggle Dog is offline
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Join Date: Jul 2008
Location: Surprise, AZ, USA
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My roommate has a 1991 W126 350SDL as a daily driver. The original 3.5 engine died and it was replaced with a 3.0 from a 1987 W124 300D, which was a good choice.

It has ASD and I just got done rebuilding the tandem power steering pump. Keep in mind that rebuilt tandem pumps are VERY expensive, and I don't think you could buy a rebuild kit if you tried. My roommate and I scoured the internet for a long time and everyone that said they had a kit ended up coming back saying that they are no longer available. We finally found a place that had two older stock kits left and bought them both.

This one came stock with a parallel-flow condenser (it actually has a part number in EPC). Overall, it's a nice car, but it has a few parts that are impossible or expensive to buy new, and the same goes for finding the parts used.

For example, the plastic coolant reservoir is special to the 350SDL as it's skinny and long. Expensive. The radiator is specific to the 350SDL and it's not available new ANYWHERE for any price. So, you have to repair the old one, install a used one, or have one fabricated.

If you buy one, be prepared to replace the block or entire engine if it suddenly fails. Also make sure to have extra money on hand for those 350SDL-specific parts as they can be pricey. The transmissions are also prone to losing reverse due to having springs that are too heavy in the reverse clutch pack. All that aside, it's probably one of the best W126s made, and will likely be the most valuable model due to the low production numbers and remaining survivors, not to mention they sip fuel unlike the big V8 models.
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Would you be afraid of a 350 SDL?-12705.jpeg  
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1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles
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