Replaced mine last year...five minute job.

Located just below the oil filter. Tight working area due to starter and some intake stuff occupying said space. A short wrench (7" or less) makes this an easy task...no room to turn a larger one!

Careful with the sender connection...the plastic has been subject to heat and age and is probably brittle...

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car