Should I keep the GLS?
1. Upper Timing Cover Reseal
2. Remove & Replace Drive Belt and Idler Pulley
3. Remove & Replace Water Pump and Turbo Coolant
4. Remove & Replace Suspension Control Arm Bushings
5. Probably would need to replace brakes soon
My thoughts:
1. I would love to keep it. It's an amazing car.
2. Is it worth putting money in to get everything fixed? My concern are other issues that might come up after this.
3. Does anyone have a high mileage GLS 550 and what are your recommendations.




1. Upper Timing Cover Reseal
2. Remove & Replace Drive Belt and Idler Pulley
3. Remove & Replace Water Pump and Turbo Coolant
4. Remove & Replace Suspension Control Arm Bushings
5. Probably would need to replace brakes soon
My thoughts:
1. I would love to keep it. It's an amazing car.
2. Is it worth putting money in to get everything fixed? My concern are other issues that might come up after this.
3. Does anyone have a high mileage GLS 550 and what are your recommendations.
$8k at once is a lot, but $4k a year not so much for German cars at this mileage. Keep in mind a new vehicle will cost you $100k. I have yet to see any critical new safety or luxury features that would require me to upgrade. Would love to have appleplay but the bluetooth works just fine.
Yes we got a fault code for turbos (110k mi) but they seem to be doing ok.
The GLS550 still holds up relative to a lot of newer models, and the value you'll get on trade/selling it won't be much. IMO the new GLS is not really worth the significant price premium as it is a very similar car with new sheet metal, unless money is not really a factor.
$8k at once is a lot, but $4k a year not so much for German cars at this mileage. Keep in mind a new vehicle will cost you $100k. I have yet to see any critical new safety or luxury features that would require me to upgrade. Would love to have appleplay but the bluetooth works just fine.
Yes we got a fault code for turbos (110k mi) but they seem to be doing ok.
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Thinking about pending airmatic issues, suspension refresh, turbo issues and two routine maintenance issues upcoming (spark plugs/ignition coils and tranny filter change/service/rear differential oil change). I switched to oil changes at 5K intervals at home knowing that this will delay turbo failure. I’m inclined to perform a full suspension refresh and at least make this car drive like new and hope I get a few more years out of it as it will be more economical than buying a new car unless the new car is a Toyota.

Last edited by bkdc; Dec 12, 2024 at 03:27 PM.
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2) basic maintenance and easy (enough) to do in the driveway. Is the belt cracked or sloughing bits? Yes: do it. No, and the bearings aren't loud when the engine is cold, don't bother.
3) drain and fill coolant? Easy and worth doing before 150K miles.
4) Is the steering still tight or do you feel slop? If the former, skip it. If the latter, do it.
5) Brakes are easy; what do the pads and rotors look like? If there's only a few mm left on the pads, it's time.
I'm struggling to see how this list could be over 4k to say nothing of $8K.





