I thought I would update my thread.. just under 2 years of ownership.
I only use my SL55 AMG during the summer months.. as I have other cars, the rest of the time its locked away so I really have not got the most use out of it as yet, about 2000 miles so far. Ownership has been a learning curve, and my ownership so far has been positive.. I still love the car.. plus its ULEZ compliant too! despite being a 2003 car.
I have had a few niggles so far, but none have made me want to get rid.. I went into ownership with my eyes wide open.
My main niggles was as previously written, water leaking into the boot though the seal.. Something I should have checked more carefully.. This is now fixed and watertight, along with a brand new PSE pump, both of which I replaced myself. I have also replaced the front brake discs and pads myself with genuine MB parts, as well as the boot gas struts, alarm siren, windscreen washer pump, The plastic trim on the side of the rear window, the rear battery, and the ABC resovoir cover.
My car had (yesterday) a full inspection at a Mercedes Independent specialist, who have replaced the Engine oil and filter, gearbox oil and filter, SBC brake fluid, 16 spark plugs, (I replaced the Air filters and charcoal filters last year) and the car is booked back in to have its engine and gearbox mounts replaced, a new propshaft rubber coupling, new supercharger belts.. plus they coded my PSE pump for me, so the multicontour seats will work (fingers crossed).
Everything else has been looked at and found to be in good condition considering its 20years old now.
I am planning some longer drives this year in the SL55, and it's reassuring to do that having had a specialist give it a good look over.
The car has been a delight to own.. driving it it a pleasure.. and on the rare occasions I boot it.. it sounds a glorious deep rumbling barratone, especially fun with the roof down!
I will update with ownership costs so far very soon.
John