Does your SD have the early 55A unit? There was also a 65A unit that will work. I had a 65 on mine for a while until I went up to an 80A unit.

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'15 GLK250 Bluetec 118k - mine - (OC-123,800)
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'01 SL500 - 103k(km) - dad's (OC-110,000km)
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